Dr Kate Brignall,

No genetic predisposition has been noted except probably in cases in femoral hypoplasia-unusual facies syndrome diabetes mellitus gestasional buy glipizide in india. Classification Numerous classification systems have been proposed some of which are based on radiographs some functional diabetes test hc1 glipizide 10 mg order. Paley Classification Perhaps the latest system of classification3 this enables to aid in planning of reconstructive procedures diabetes symptoms ppt discount 10 mg glipizide visa. Group I is the best for lengthening and correction of the femoral neck varus and acetabular dysplasia is recommended before lengthening diabetes prevention program budget buy 10 mg glipizide. Aitken Classification1 this is the first and most widely used classification with some clinical relevance diabetes insipidus babies buy glipizide with a visa. Gillespie and Torode Classification2 It is a clinically based treatment-oriented classification where patients are divided in two groups. There is an anterolateral bowing of the femur and also valgus and external rotation of the knee. Anteroposterior laxity occurs due to anterior cruciate ligament deficiency of the knee joint. The affected thigh is extremely short, hip flexed and abducted and the limb is externally rotated with associated knee flexion contracture. The hip abductors and extensors although present are unable to act effectively due to the abnormal proximal femur. In about 45% of cases, patient has an associated fibular hemimelia ipsilaterally, short tibia and equinovalgus foot deformity with lateral foot rays missing. Children with congenital femoral deficiency of any severity have normal milestones and are able to compensate for their deformities by adaptive patterns such as walking on the flexed knee of the normal lower limb and foot of the affected side in cases of less severe shortening by keeping their hip and knee of the normal side flexed and equinus of the shortened limb to achieve their goal. Even the child with most severe proximal focal femoral deficiency walk even if they have no treatment but the gait is far from optimal. Treatment It is first and most important to distinguish between congenital short femur and proximal focal femoral deficiency. Proximal focal femoral deficiency denotes a radiologically demonstrable defect in proximal femur. Congenital short femur can be corrected in most cases by limb equalization while the more severe proximal focal femoral deficiency will need prosthetic assistance. Also the socioeconomic status, facilities available, skill and experience of the surgeon and parental wishes all are factors in decision-making. The problems in these conditions include shortening, associated deficiencies in the same limb such as fibular hemimelia and its associated foot and ankle problems and hip problems such as coxa vara, delayed ossification of neck and total absence of the proximal femur. Pelvic involvement consists of varying degrees of acetabular dysplasia, in the knees flexion and valgus deformities and instability. In the first year of life, both congenital short femur and proximal focal femoral deficiency do not need any treatment as short femur will not prevent crawling or sitting. It is during this 3099 time the treatment plan must be made and discussed with family. In treating congenital short femur, it is important to distinguish between two groups: (a) children with a good foot and ankle and (b) deficient foot and ankle as seen with associated fibular hemimelia. To enable gait before 3 years of age if the foot and ankle is normal no assistance is required to walk. If the limb-length discrepancy increases, a shoe lift less than 4 cm may be helpful. The percentage of limb-length discrepancy remains constant unless surgically altered, ideally a good foot and ankle is required and length should be equalized by skeletal maturity. Monolateral or circular fixators can be used keeping in mind the frame stability considerations and principles. Also while on fixator good physiotherapy must be available to maintain the knee range of motion. Appropriately timed epiphysiodesis of the contralateral limb is also helpful in certain cases. Limb-length equalization is not a realistic goal that can be achieved as the amount of shortening is too great. An attempt must be made to obtain a stable hip if the femoral head, neck and acetabulum are developed either by corrective osteotomy or screw fixation. The thigh segment should function as a strong lever to propel the limb while walking and the knee joint should be stable by fusion. If foot and ankle are functional a rotationplasty would be ideal and a below knee prosthesis fitted. However, with upper limb deficiencies where foot may assume prehensile functions or parents refuse any surgical foot intervention then an extension prosthesis is fitted. Knee fusion should be considered in most instances to improve stability; however, if the knee is situated very proximally then surgery may not be needed. A mention must be made of the very uncommon bilateral proximal focal femoral deficiency wherein the primary problem is of very short stature and waddling gait. In these cases treatment is limited to the use of extension prosthesis to increase height and enable the child to partake in certain physical activities. In summary, both congenital short femur and proximal femoral deficiencies need careful judgment in planning for treatment. Both limb lengthening and amputation and prosthetic fitting are accepted modes of treatment depending on the pathology as well as socioeconomic considerations. It should be remembered that limb lengthening techniques, although seeming an attractive option, have their share of complications and also these patients need to be followed up at least till skeletal maturity. It is a rare disorder and has an incidence of 1 in 1 million live births (1 in 1,000,000). Similar to ulnar aplasia, tibial hemimelia occurs 2 times less frequently than fibular/radial aplasia. Reconstruction of the ankle joint after soft-tissue release and bony procedure for the equinovarus foot deformity and tibiofibular synostosis has been described. The advent of the Iliazarov method of reconstruction has resulted in the pendulum swinging back towards restoration of leg length, achieving a plantigrade foot and a stable knee with a functional range of movement. Deformities appearing in the same limb are clubfoot, abnormal insertion of quadriceps, bifid femur, agenesis of patella, syndactyly of the foot, agenesis of the first ray. Deformities appearing in other parts of body include polydactyly, split hand, agenesis of fingers and toe. Prenatal diagnosis of isolated or syndromic tibial defects by real-time ultrasound is recommended. Autosomal dominant ectrodactyly and absence of long bones of upper or lower limbs: further clinical delineation. Tibial aplasia-hypoplasia and ectrodactyly in monozygotic twins with a discordant phenotype. Treatment the type of surgical treatment depends on the radiographic classification and clinical appearance including the adequacy of quadriceps function and extent of limb length discrepancy. Severe deficiencies with lack of quadriceps function are treated with early amputation and prosthetic rehabilitation. This article summarizes the history of radial deficiencies, lists potential etiologies, highlights relevant pathoanatomy, discusses treatment regimens, reviews expected outcome and details potential complications. The reported incidence of radial club hand in western literature varies between 1 per 55,000 and 1 per 100,000 live births according to European authors. However, exposure to teratogens, such as thalidomide and radiation, is strongly implicated in causing radial deficiencies. Radial deficiency is bilateral in 50% of cases and is slightly more common in males than in females (3:2). The familial incidence of radial deficiency is less as compared to club feet: only in approximately 5% of reported cases at best. When recorded it is most common in radial aplasia associated with cardiac abnormalities. This malalignment assumes a perpendicular relationship over time especially with increasing severity of the dysplasia. The right-angled position of the wrist further shortens the appearance and functional length of the upper limb and limits the ability to reach into space. The awkward angulation between the wrist and forearm places the extrinsic flexors and extensors at a mechanical disadvantage. The tendons must traverse this angle to elicit finger motion, which limits the ability to move the digits. The digits in varying proportions too are anomalous, either by virtue of camptodactyly, i. The amalgamation of several anomalies hence affects the usability of the forearm and hand for basic grasp, release and fine movements with the net loss of mechanical advantage. Historical Background Petit first described radial club hand in an autopsy of a neonate with bilateral club hands and absent radii, in 1733. Subsequently, many other observers have studied autopsy findings and detailed the anomalous anatomy locally in the upper limb in radial dysplasia along with the associated malformations of other body systems. Initial surgical treatment of radial club hand involved an ulnar osteotomy to correct the bow, along with splitting of the distal ulna for insertion of the carpus. Centralization of the carpus on the distal ulna has emerged as the preferred surgical technique to correct radial club hand. The scapula is often small, and the clavicle is often shorter, with an increased curvature. The humerus may or may not be short, and deficiencies of the capitellum and trochlea are common. True forearm Etiology the etiology of radial club hand has been theorized to be abnormal pressure upon the embryo along the radial bud between the third and seventh week of gestation in 1895. This structure is a thickened layer of ectoderm that directs differentiation of the underlying mesenchymal tissue and limb formation. The wrist is radially deviated and develops a perpendicular relationship to the forearm over time. The articulation between the carpus and ulna is usually fibrous and abnormal, although some hyaline cartilage can be found. Ossification of the carpal bones is delayed, with the scaphoid and trapezium often absent or hypoplastic. The preaxial index and long fingers are more affected than the postaxial ring and small digits. Muscle and Tendon Abnormalities Numerous muscular abnormalities are found throughout the upper extremity. A modified classification of radial longitudinal deficiency has been developed to combine thumb, carpal anomalies, and forearm into a single scheme by Manske McCarroll et al. The forearm demonstrates the most severe abnormalities, involving any muscle that originates or attaches to the radius. This includes the extensor carpi radialis longus, extensor carpi radialis brevis, pronator teres, flexor carpi radialis, palmaris longus, flexor pollicis longus, pronator quadratus and supinator muscles. The extrinsic flexors and extensors of the fingers are usually adherent, with abnormal origins and insertions. The flexor and extensor carpi ulnaris, as well as the interossei, lumbricals, and hypothenar muscles, are often normal, while abnormalities of the thumb muscles are more related to the degree of thumb hypoplasia. Nerve and Artery Abnormalities the radial nerve usually terminates at the elbow, and the ulnar nerve is normal. An enlarged median nerve substitutes for the absence of the radial nerve and supplies a dorsal branch for dorsoradial sensibility. This subcutaneous branch is positioned in the fold between the wrist and forearm and must be protected during surgery. The radial artery is often absent, and the interosseous arteries usually remain patent. The principal organ systems involved in these are the cardiac, renal and hematology cell lines (Table 1). In addition to these conditions, a variety of associated musculoskeletal deformities appear sporadically. These include cleft palate, clubfoot, kyphosis, scoliosis, torticollis and rib deformities. Vertebral abnormalities, anal atresia, cardiac abnormalities, tracheoesophageal fistula, esophageal atresia, renal defects, radial dysplasia, lower limb abnormalities Aplastic anemia not present at birth; develops at about 6 years. Compensatory movements are noted to prevent inadvertent disruption of these adaptive mannerisms with surgical intervention. Indications and Goals the basic goals of treatment are as follows:8 · Correct radial deviation of the wrist · Balance the wrist on the forearm · Maintain wrist and finger motion · Promote growth of the forearm · Improve function of the extremity · Enhance limb appearance for social and emotional benefit. In those children with considerable absence of the radius, the wrist assumes severe radial deviation that increases to 90° over time. This further compromises the flexor and extensor tendons, creating functional difficulty. Thumb hypoplasia also requires consideration when formulating a treatment plan for radial club hand. Contraindications Contraindications for surgical intervention are mild (type I) deformity in children, a limited life expectancy in a child and elbow extension contractures that prevent the hand from reaching the mouth if the deformity at the wrist is corrected. The hand tends to develop a perpendicular relationship to the forearm Investigations As a protocol, all radial dysplasia patients should be fully investigated and referred to pediatric subspecialists. The kidneys are examined by ultrasound, and the platelet status is assessed by blood count and peripheral blood smear. Plain radiographs are obtained to evaluate the degree of radial aplasia and to assess associated abnormalities of the elbow, wrist and hand. In radial club hand, ossification is delayed, and final determination of complete aplasia of the radius or carpus must be deferred until later (up to the age of 8 years). Children with Fanconi anemia do not have grades both thumb and radius deficiencies based on radiographic findings. The delayed ossification of the radius and carpus in preaxial deficiency must be considered during application of this scheme. Examination A detailed clinical evaluation must be done to assess the degree of involvement. The shoulder, elbow, wrist, and digital range of movement are evaluated for active and passive motion.

Proximal femoral allograft in revision hip arthroplasty is described by Allen Gross et al diabetes type 2 signs and symptoms cheap glipizide online visa. The number of patients in their series was 69 with average 36 months follow-up duration with 85% success rate diabetes in dogs and panting cheap glipizide 10 mg buy. Our experience at Bombay Hospital diabetic diet 1200 calories a day 10 mg glipizide, 22 periprosthetic fracture out of total 3 managing diabetes at everyday health purchase 10 mg glipizide with visa,200 hip replacement which corresponds to 0 diabetes prevention 7 day meal plan glipizide 10 mg buy with mastercard. All fractures were united except one in which there was nonunion which lead to fracture of the implant. Stem Fracture Deformation or fracture of stem in cemented arthroplasty occurs after several years of surgery due to repeated cyclic loading. Wrobleswki reported 120 cases of Charnley fractured stems and the incidence of flat back stem fracture was 1. In 1975, Charnley reported 17 fatigue fractures and the mechanism quoted was poor proximal fixation and rigid distal fixation. The design of the Charnley stem was improved from sharp corners to rounded corners which reduced the incidence of fracture. The flang of the proximal stem was introduced in 1980s which further reduced the fracture of the stem. Proximal fragment removal is easy but most of the times distal stem is well fixed, hence extraction is always difficult. High speed drilling with a carbide drill followed by tap and extraction of the distal fragment is done. This allows direct access for removal of the distal stem and easy removal all the cement. Second most common cause of failure is loss of support of bone cement in proximal one-third shaft femur, leading to cantilever force and ultimately fracture of stem. Torsional deformation produces combination of forces which deflects the stem medially and posteriorly. Hence fracture starts on anterolateral surface and progresses to the medial border. This has led to significant swing away from the cemented sockets to cementless socket. However, clinical and radiological evaluation over a long period indicates acrylic cement fixation can be acceptable as a biologically compatible material. Improved material design and cementing technique will allow successful long-term results in higher percentage of patients in future. At long-term follow up at 10­12 years there was 15% radiological loosening which was attributed to unsophisticated cement technique, inappropriate acetabular component and quality of adjacent bone (John Older). Radiological loosening was reported by Harris 6­23% had 10­ 15 years follow-up and Schulte 150 reported 22% failure at 5­20 years follow-up. In general these patients were operated 3294 TexTbook of orThopedics and Trauma compression molded polyethylene has a wear rate of 0. The long term data from our unit in a cemented arthroplasty as far as acetabulum is concerned have a high failure rate than the femoral component. Large numbers of failure were attributed to high demand, over active patients and the acetabular wear (unpublished). Femoral Loosening Aseptic loosening of femoral component is now a major complication of this otherwise reliable procedure as the length of follow up increases and more particularly as operation is applied to younger and more active patients, incidence of aseptic loosening can be expected to rise. Indeed orthopedic surgeons are heavily involved in adult hip surgery already find that revision operation for loosening occupies steadily increasing proportion of their operating time. Perhaps we are expecting artificial hip to carry all the functions of normal hip joint. Frictional property of bearing of normal hip is 70 times better than those best currently available artificial hips. This means that bone supporting artificial joint will be exposed to stresses that are abnormal in both direction and magnitude in comparison with bone that supports the articular surface of a normal hip. Added to this are extra stresses produced by impingement of component and lack of protective nerve supply as an inhibitor to heighten the chances of loosening (Robert Ling 1984). Comparative radiographs at various intervals with standard position and distance are reviewed on a large screen. In spite of gross radiological loosening patient might remain asymptomatic and many authors have not documented femoral loosening in their studies. Progressive increase in the extent and width of radiolucent line between acrylic cemented and the bone 2. Femoral component loosening presents with clinical findings such as thigh pain, rotational torque pain and weightbearing pain. These signs are diagnostic features of femoral loosening which must be supplemented with radiology. There are two type of radiological loosening: (1) loosening at bone cement interface; (2) loosening at cement implant junction. Less than 1 mm radiolucent line in zone one at implant cement junction called as black line should be kept under observation. But this line in Charnley stem must be kept with close observation, if this progresses in subsequent follow-up one should consider femoral loosening. Some author feels that radiological loosening should be taken as a evidence of failure in spite of good clinical success. Loosening in less than 10 years follow-up duration is due to failure of surgical technique. The biological failures are mainly related to osteolysis produced due to wear particles. Today the major concern in longevity of the acetabular cup is only wear particles and osteolysis. Once the acetabulum is worn more than 4 mm which can be identified radiologically which leads to neck impingement and secondary acetabular loosening (Wroblewski 1982). Last 10 years the hip arthroplasty research has been towards how to minimize the wear or find a suitable articulation. Progressive radiolucent lines at implant bone cement or cement bone junction are to be considered the impending failure of femoral stem. The cause of the femoral loosening in a cemented hip arthroplasty has been contributed to surgical technique: · Poor preparation of femoral canal · Over-reaming and removing cancellous bone which is paramount importance for micro interlock · Varus position of the femoral stem · Poor cementing (Grades C and D). His observation was radiolucency in Zone 1 in initial postoperative X-ray had higher rate of loosening which was 21. In these case subchondral bone was preserved, 10­15 5 mm deep holes were made, lavage and pressurization was used. One evidence at 10 years from Swedish registry stating revision rate has fallen from 9% from 1979 cohort of patient to 2. The flang socket definitely has reduced radiolucent lines in postoperative radiographs. The flangs cup showed no radiolucent line in 82% of the sockets and 60% in unflang sockets. Femoral Stem Improvement and modification in surgical technique design and material is integral part of evolutionary progress of science in arthroplasty. These are brought by long-term results and intraoperative findings during revision surgery. There is correlation between the depth of cup penetration and incidence of migration. One of the prospective studies showed combined effect on reduction of aseptic cup loosening and revision of over 50%. The introduction of triple taper polished stem (C-stem) and surgical technique to avoid distal support have prevented changes and improved radiographic changes in large proportion of cases. They reported 69 hips in 48 patients with survival for aseptic loosening with average follow-up of 11. Currently available uncemented sockets have shown high wear rate, osteolysis and exchange of liner. One of the randomized studies between cemented and uncemented sockets showed high wear rate with cementless acetabular fixation at 15 years. Clinical application may have some promise but will need to wait for long-term results. One study showed 24 retrieval highly cross polyliners with evidence of early deformation surface changes in every case. The correlation between Roentgenographic appearances and operative findings at bonecement junction of socket in Charnley low-friction arthroplasties. Long term results of total hip replacement in young patients who had ankylosing spondylitis. Total hip replacement in patients with ankylosing spondylitis with involvement of hip. Wander A, Vander Heijde D, Landewe R, et al Nonsteroidal antiinflammatory drug reduces radiographic presentation in patients with ankylosing spondylitis: a randomized clinical trial. Assessment of efficacy of pulse ibandronate therapy in nonsteroidal anti-inflammatory drug refractory ankylosing spondylitis. Early referral recommendation for ankylosing spondylitis including pre radiographic and radiographic normal in primary care. Exeter Universal cemented femoral component at 15­17 years follow-up was reported in first 325 hips with 309 patients. In this group 97 patients with 108 hips were still alive and survival reported of these hips at 17 years was 100% for stem and 94. At 15 year follow-up stem survival was 93% and overall survival for any cause was 85%. Exeter polished stem reported from other centers have overall survivorship of 95% at 10 years. Orthopedic department of university of Basel/Switzerland- survival for aseptic loosening was 100%. Midterm results of multi surgery series of 333 stem, 6­10 year follow-up-University of Heidelberg/Germany showed 98. Pattern of rheumatic diseases in South India-ankylosing spondylitis a clinical and radiological study. Role of bone grafting in correction of protrusio acetabuli by total hip arthroplasty. Fracture of acetabulum: accuracy of reduction and clinical results in patients managed operatively within 3 weeks after the injury. Acute total hip arthroplasty for selected displaced acetabular fracture: two to twelve-year result. Open reduction internal fixation and primary total hip arthroplasty of selected acetabular fractures. Total hip arthroplasty for failed treatment of acetabular fractures: a 5-year follow up study. Conversion of failed hemiarthroplasty to total hip arthroplasty: A short to mid-term follow-up study. Conversion from failed hemiarthroplasty to total hip arthroplasty: a Norwegian Arthroplasty Register analysis of 595 hips with previous femoral neck fractures. Reimplantation of artificial hip joint in a girdle stone hip is superior to girdle stone arthoplasty by itself. Impacted morsellized bone grafting and cemented primary total hip arthroplasty for acetabular protrusion in patients with rheumatoid arthritis: an 8- to 18-year follow-up study of 36 hips. Immediate cementless total hip arthroplasty for the treatment of active tuberculosis. Contributory factors and etiology of sciatic nerve palsy in total hip arthroplasty. Postoperative sciatic and femoral nerve palsy with reference to leg lengthening and medialization/lateralization of the hip joint following total hip arthroplasty. Relationship between length of stay and dislocation rate after total hip arthroplasty. Posterior approach to total hip replacement using enhanced posterior soft tissue repair. The early dislocation rate in primary total hip arthroplasty following the posterior approach with posterior soft tissue repair. Effect of femoral head diameter and operative approach on risk of dislocation after primary total hip arthroplasty. The transverse acetabular ligament: an aid to orientation of the acetabular component during primary total hip replacement: a preliminary study of 1000 cases investigating postoperative stability. A comparative study of effectiveness of a preoperative education programme for total hip arthroplasty. Preoperative physical activity, anesthesia and analgesia: effects on early postoperative walking after total hip replacement. The relationship of operative wound culture to deep wound sepsis following total hip arthroplasty. Prospective analysis of preoperative and intraoperative investigations for diagnosis of infection at the sites of two hundred and two revision total hip arthroplasties. Bone scan, gallium scan and hip aspiration in the diagnosis of infected total hip arthroplasty. Extended combined Tc-white blood cell and bone imaging improves the diagnostic accuracy in detection of hip replacement infections. Revision operations on infected total hip arthroplasties: two- to nine-year follow-up study. The outcome of two-stage arthroplasty using a custom-made interval spacer to treat the infected hip. Acetabular anatomy and the transacetabular fixation of screws in total hip arthroplasty.

It occurs more frequently in women with a primary squamous epithelial cancer in another site of the female genital tract blood glucose health app glipizide 10 mg amex, especially the cervix metabolic disorder glucose 10 mg glipizide for sale, which shares with the vulva a common embryologic origin from the cloacogenic membrane diabetes test walk in centre buy glipizide 10 mg amex. Clinical course: this well-differentiated neoplasm is locally invasive and may frequently extend into deep adjacent structures gestational diabetes diet uk purchase glipizide 10 mg amex, but diabetes type 1 treatment new order glipizide 10 mg on line, as a rule, it does not cause distant metastases. Diagnosis: It may be difficult to diagnose from insufficiently large biopsies, resulting in misdiagnosis and inappropriate treatment. Differential diagnosis: Anogenital warts, squamous cell carcinoma, hypertrophic lichen planus, and lichen simplex chronicus. Papules 121 Therapy: Surgery is considered the most effective treatment, but it can be associated with local recurrences, especially when the tumor has been inadequately resected. Radiation therapy is poorly effective and may cause anaplastic transformation into a squamous cell carcinoma. Bibliography Boutas I, Sofoudis C, Kalampokas E, Anastasopoulos C, Kalampokas T, Salakos N. Verrucous squamous cell carcinoma of vulva simulating multiple epidermal inclusion cysts. Frequent symptoms are soreness, severe burning, and pain, often causing dysuria and dyspareunia. Patients with vaginal involvement may complain of a vaginal discharge that may be blood stained. Definition: It is a chronic, painful condition affecting mucosal surfaces, mainly the mouth (oral lichen planus) and the genitals (vulval or penile lichen planus). This clinical form is often variably defined as ulcerative lichen planus, desquamative inflammatory vaginitis, or (when concomitant oral involvement is present) vulvovaginal­gingival syndrome. Associations with other autoimmune diseases (alopecia areata, vitiligo, and thyroid disease) and hepatitis C infection have been reported. Epidemiology: the prevalence of erosive lichen planus in the general population is unknown, but this is considered the most common clinical variant affecting the genitalia. Clinical course: If left untreated, architectural changes resulting in atrophy and scarring can follow, with loss of the labia minora, sealing of the clitoral hood, and burial of the clitoris. In the most severe cases, tissue destruction may lead to the development of synechiae and vaginal stenosis, which can result in hematocolpos, dyspareunia, and sexual impairment as a consequence of extensive atrophy and scarring with stenosis of the vaginal orifice. In long-standing, aggressive forms, possible malignant degeneration should also be taken into account, although this is still a controversial issue. Diagnosis: It is suggested by the clinical features and supported by histological examination. Differential diagnosis: Autoimmune bullous skin disorders (pemphigus vulgaris and bullous and cicatricial pemphigoid) may be ruled out by immunofluorescence studies. Bullous drug eruptions (fixed drug eruption and erythema multiforme) should also be considered. As it is a chronic complaint, topical and systemic treatment may be required intermittently or continuously over the long term. The first-line medical treatment is generally an ultra-potent topical corticosteroid ointment. Surgical release of vulval and vaginal adhesions and scarring may be performed to manage urination difficulties and allow intercourse. Erosive lichen planus: Retrospective review of characteristics and outcomes in 113 patients seen in a vulvar speciality clinic. Diagnostic criteria for erosive lichen planus affecting the vulva: An international electronic-Delphi consensus exercise. Definition: It is the most common type of malignant skin cancer, more often found on sun-exposed skin areas, but it occurs very rarely on the vulva. Several individual (fair skin, immune deficiency, nevoid basal cell carcinoma syndrome, and xeroderma pigmentosum) and environmental (ultraviolet light or ionizing radiation exposure, arsenic ingestion, previous trauma, chronic irritation, and syphilis) precipitating factors have been considered, although results have been inconclusive. Epidemiology: It is rare, accounting for less than 5% of all vulvar neoplasms and less than 1% of all basal cell carcinomas, but vulvar involvement is reportedly four times more frequent than its male counterpart. Metastases have occasionally been reported, especially in cases of the sclerosing type or with perineural invasion. Differential diagnosis: Dermal melanocytic nevus, seborrheic keratosis, neurofibroma, trichoepithelioma, sebaceous hyperplasia, dermatofibroma, acrochordon, wart, nodular melanoma, clear cell acanthoma, and appendageal tumors. Incomplete excision may result in local recurrence, so close long-term follow-up is necessary. Vulvar basal cell carcinoma in a 20-year-old: Case report and review of the literature. Definition: It is a malignant epithelial tumor originating from epidermal keratinocytes. Epidemiology: It is a rare disease mainly seen in elderly women that accounts for 5% of all female genital malignancies. Clinical course: Local invasion and lymphatic spread to inguinal lymph nodes is common. Diagnosis: Biopsy is essential to rule out other conditions and identify the histological subtype. Differential diagnosis: Verrucous carcinoma, hypertrophic lichen planus or lichen simplex chronicus, anogenital warts, and extramammary Paget disease. Therapy: Staging is essential for proper treatment planning; whenever feasible, surgical excision is recommended. Systemic therapy in squamous cell carcinoma of the vulva: Current status and future directions. The diagnostic challenge of vulvar squamous cell carcinoma: Clinical manifestations and unusual human papillomavirus types. Definition: It is a chronic mucocutaneous inflammatory disease that affects the genitalia and, less often, the extragenital skin (upper trunk and arms). The isomorphic (Koebner) phenomenon is described in this condition, with resultant lesions in old surgical scars, burn scars, sunburned areas, and areas subject to repeated trauma. It is most common in middle-aged women (male:female ratio = 1:6), but can also occur in children (up to 15% of cases) from infancy onwards. Clinical course: Over time, marked sclerosis may cause marked hypopigmentation, atrophy, and scarring with vulvar flattening, labial fusion, buried clitoris, constriction and fissures of the vaginal introitus, and loss of normal vulvar anatomy (kraurosis). This disabling disorder is often the cause of psychological discomfort as a result of sexual dysfunction, significantly impairing the quality of life. Risk of malignant degeneration is significant (3%­6% of cases) and should be suspected, prompting a skin biopsy, especially in case of persistent hyperkeratosis or erosions. It has been reported that prepubertal disease in girls may resolve spontaneously, although some of these patients may go on to suffer from various types of vulvodynia in adulthood. Differential diagnosis: Lichen planus, lichen simplex, vitiligo, postmenopausal atrophy, cicatricial pemphigoid, extramammary Paget disease, and sexual abuse. Therapy: this disorder may be responsive to potent topical corticosteroids, although the patient should be warned that the clinical appearance does not always reverse, even if symptoms are relieved. Topical calcineurin inhibitors have been found to be helpful in some patients, but they do not work as rapidly or as effectively as potent topical corticosteroids, and deserve a role in maintenance treatment at best. Surveillance is recommended to promptly detect and treat any bacterial, mycotic, or viral superinfections that may result from protracted topical therapies. Mutilating gynecologic surgery for this benign disorder should be avoided, unless an associated malignancy is present. Influence of treatments on prognosis for vulvar lichen sclerosus: Facts and controversies. The association of lichen sclerosus and erosive lichen planus of the vulva with autoimmune disease: A case­control study. Genital vulvar lichen sclerosus in monozygotic twin women: A case report and review of the literature. Early onset vulvar lichen sclerosus in premenopausal women and oral contraceptives. Prospective clinical and epidemiologic study of vulvar lichen sclerosus: Analysis of prevalence and severity of clinical features, together with historical and demographic associations. Elective sites of involvement are the labia minora and majora, clitoris, fourchette, urethral meatus, and vaginal ostium. Multiple lesions are often bilateral and symmetrical and tend to join up progressively. Occasionally, ecchymotic, teleangiectatic, and purpuric patches or raised, granulomatous, nodular, or erosive plaques have been reported. This condition may be asymptomatic or be associated with pruritus, burning, pain, and dyspareunia. Definition: It is a rare benign, circumscribed inflammation of the vulvar mucosa characterized by plasma cell infiltration. Suggested predisposing factors include warmth, friction, poor hygiene, herpes simplex, and other chronic infections. Epidemiology: In contrast to plasma cell balanitis, it is an extremely rare skin condition (there have been only 31 cases reported worldwide). It is found in women ranging in age from 26 to 70 years and has never been observed in prepubertal girls. Clinical course: It is chronic and relapsing, with lesions tending to persist for many years. Differential diagnosis: this condition must be primarily differentiated by erythroplasia. Therapy: Topical corticosteroids and intralesional injections have been used with varying degrees of success. Topical calcineurin inhibitors, retinoids, and interferon have shown some benefit in a few patients. Other therapies to consider include topical antifungals and antibiotics, caudal nerve blocks, cryotherapy, and simple excision. Bibliography Çelik A, Haliloglu B, Tanriöver Y, Ilter E, Gündüz T, Ulu I, Midi A, Özekici Ü. Definition: Erythroplasia of Queyrat is a premalignant condition of the visible mucous membranes and represents an intraepithelial squamous cell carcinoma (carcinoma in situ). Etiology: Poor hygiene and chronic irritation have been claimed to be possible risk factors, but its causes remain unknown. Clinical course: Erosions and ulceration may occur and usually reveal evolution into an invasive squamous cell carcinoma. Differential diagnosis: the most important differential diagnosis is plasma cell vulvitis. Therapy: Lesion removal by surgical excision or other ablative means (Mohs surgery, electrocautery, laser therapy, or photodynamic therapy) and close follow-up are indicated. Patients frequently complain of pruritus, burning sensations, and pain in the affected site. Plaques 135 Definition: Extramammary Paget disease is an uncommon intraepithelial adenocarcinoma that most commonly occurs in the anogenital region. Etiology: It is thought to originate from intraepidermal apocrine glands or from pluripotent keratinocyte stem cells as a result of an as-yet unknown multicentric carcinogenic stimulation. Epidemiology: It is considered to be a relatively rare disorder, but its true incidence is unknown. It represents 1% of vulvar malignancies and occurs most frequently in postmenopausal women. Clinical course: Untreated lesions progressively extend and persist for years before becoming invasive. Associations with underlying malignancies (genital, urinary, and gastrointestinal) have been reported. Differential diagnosis: Contact dermatitis and other eczematous conditions, common bacterial/fungal infections, Hailey­Hailey disease, psoriasis, lichen sclerosus, and squamous cell carcinoma. Bibliography De Magnis A, Checcucci V, Catalano C, Corazzesi A, Pieralli A, Taddei G, Fambrini M. Vulvar Paget disease: A large single-centre experience on clinical presentation, surgical treatment, and long-term outcomes. Extramammary Paget disease of the vulva with underlying mammary-like lobular carcinoma: A case report and review of the literature. Definition: Psoriasis is a chronic and/or relapsing inflammatory skin disorder clinically presenting with erythematous patches covered by silver­white scales and typically occurring on the scalp, elbows, and knees. Epidemiology: In most cases, genital psoriasis is part of a more generalized disease and occurs in up to 40% of patients with plaque psoriasis. Clinical course: As a chronic and relapsing disorder, vulvar psoriasis may be stressful for patients, causing sexual concerns and considerably impairing their quality of life. Diagnosis: the clinical diagnosis is not difficult when typical psoriatic patches are evident in the vulvar area or elsewhere. Microbiological investigations may be useful for ruling out primary or secondary infections. Therapy: In case of exclusive genital involvement, topical corticosteroids, in combination or not with vitamin D analogs (calcipotriol), are indicated. Calcineurin inhibitors (pimecrolimus ointment or tacrolimus cream) may be an option. Patients should be advised to follow accurate local hygiene measures to prevent bacterial and/or fungal secondary infections related to the disease itself or that are favored by the long-term use of topical steroids or immunomodulators. Clinical course: the outcome depends on the histological subtype, cytogenetics, and clinical features, but prognosis is unfavorable in the majority of cases. Differential diagnosis: T cell lymphomas may mimic: benign skin disorders, such as eczema (including contact dermatitis), psoriasis, lichen sclerosus, and pseudolymphoma; infections, such as secondary syphilis or coccidioidomycosis; and malignant tumors, such as carcinomas and malignant histiocytoses. In general, therapies can be categorized as skin-directed (topical), phototherapeutic, and systemic treatments (chemotherapy). Transformation of vulvar pseudolymphoma (lymphoma-like lesion) into a marginal zone B-cell lymphoma of labium majus. Hyperpigmentation and varying degrees of overlying excoriation are usually evident. Itching is always present and may be severe, making this an extremely uncomfortable condition.

A variety of skin lesions diabetes type 2 in child buy online glipizide, including bruises diabetes blood test values glipizide 10 mg purchase with amex, burns diabetes mellitus uncontrolled glipizide 10 mg cheap, lacerations diabete test buy cheap glipizide 10 mg line, and scars are by far the most common findings in cases of child abuse diabetes insipidus high urine specific gravity order 10 mg glipizide amex. Bruises on back of head, neck, arms and legs, on the buttocks, abdomen, cheeks or genitalia may be suspicious for abuse. When an infant with musculoskeletal injury presents with altered mental status, whiplash shaken infant syndrome should be suspected. Violent shaking of a small child whiplashes is relatively large head back and forth over the thorax with possible development of subdural hematomas. Multiple fractures,7 evidence of repeated trauma, bruises and lacerations confirm the diagnosis. Children who are sexually abused can have symptoms or bed wetting, fecal incontinence, difficult defecation, pelvic pain, vaginal itching and bleeding, and pregnancy in postmenarchal girls. The repetitive nature of the injury is hallmarked by the presence of various stages of bone repair. The Skeletal Survey A skeletal survey is useful for finding out additional fractures in battered children. If there is any suspicion of use of poison, a toxicology screen should also be performed on the patient. Radiologic Features There is always possibility of multiple skeletal lesions, which is well described by Silverman in 1953. He presented a report on multiple long bone fractures without subdural hematoma in three children and established their traumatic basis. There is always predilection for the metaphysis with exaggerated periosteal reaction and multiplicity of the lesions in various stages of healing and repair. The physeal injuries with gross or minimal displacement of the epiphysis are common. There is profuse subperiosteal new bone formation, which converts into thick cortex Diagnosis the child with multiple fractures, evidence of repeated trauma, bruises and lacerations usually raises suspicion of battered baby syndrome. The radiogram shows the presence of various stages of bone repair, which is the hallmark of child abuse. Differential Diagnosis In the differential diagnosis, one should rule out osteogenesis imperfecta, congenital insensitivity to pain, infantile cortical hyperostosis, scurvy, congenital syphilis, Caffey disease, osteomy elitis, septic arthritis, fatigue fracture, osteoid osteoma and other tumors, rickets, leukemia, bleeding disorders, hypophosphatasia, neuromuscular disease, metastatic neuroblastoma, osteopetrosis, kinky hair syndrome, prostaglandin therapy. It is important to take the responsible members of the family into confidence and inform about this syndrome. The person concerned with battering the child should be submitted to psychiatric treatment. If the child is not protected and continues to have trauma, the police and the juvenile court must be informed by the physician. Multiple fractures in the long bones of infants suffering from chronic subdural hematoma. National Center on Child Abuse and Neglect: National child abuse and neglect Data System: Working paper 21991. Another method is parent education in specific parenting skills such as basic childcare, discipline, child development and education and familiarity with local support services. Arthrography in the diagnosis of fractures of the distal end of the humerus in infants. The clinical problems in a child are somewhat different from that of an adult, so it is important to be familiar with pediatric orthopedic examination. A brief outline of the art and science of clinical evaluation of pediatric orthopedic conditions will be discussed; detailed evaluation of a child with pediatric orthopedic problems can be referred to in individual clinical conditions. General Considerations Clinical evaluation of a child with orthopedic problems is challenging. It is also important to respect the cultural background of the family as persons from different cultural backgrounds may have their own beliefs. They may be infants who are oblivious to the problem, children who are uninformed of the problem, or teenagers though invincible can be made to cooperate with a little counseling; the most difficult group being children. It is a common practice to tell the child that "nothing is going to happen" or "I am not going to do anything"; such a statement often creates fear in the mind of the child as if something painful may happen later in the course of examination; such like statements, should be avoided. One of the best ways to befriend an apprehensive child is to divert his attention by asking about his school, cartoon, play activities, etc. Firm approach and forcible examination of the child should be reserved for totally uncooperative child, but the information derived from such an examination is usually limited. It is important to know the concerns of the family about the presenting problem and also as to who noticed the problem first and when. Often flat feet, genu varum and valgum are noticed by family friend or grandmother of the child. Lot of parents of children presenting with physiological flatfeet are concerned about future fitness for a job. History It is essential to get the history from a reliable person, usually the parents. Children older than 5 years usually are mature 3014 TexTbook of orThopedics and Trauma Birth History Birth history is important for evaluation of congenital conditions as well as static ischemic encephalopathy. While eliciting the history it is important to know the exact chronological order of events. The most common presenting complaints in children include pain, limp, deformity, weakness and swelling. An infant with pain may show pseudoparalysis or cry continuously, a young child may show discomfort, avoid using the part or complain of pain, localization of pain may at times be difficult from the history. Pain in the hip can present as referred pain in the knee, so knee pain should be evaluated for hip pathology as well; hip problems are more common in children as compared to knee problems. Refusal of a young child to walk may signify transient synovitis or a septic hip pathology. Etiology can be congenital, developmental, posttraumatic or resulting from postseptic sequelae, this should be clearly elicited in the history. Swelling of a part can be of recent onset, which points to an infective or malignant pathology, especially if associated with pain. Painless swelling of long duration is usually associated with benign tumors, such as osteochondroma. Any flexion posturing of hips and knees persisting beyond walking age is abnormal and should be evaluated further. Developmental milestones of importance to orthopedic surgeon include head holding, which should be complete by 6 months of age, sitting balance without support by 12 months of age, standing by 18 months and walking by 2 years of age. Prematurity of the child (< 40 weeks) should be taken into consideration and appropriate weeks be deducted while calculating milestones till 2. Delay in milestones indicates neurodevelopmental delay and is commonly seen in of cerebral palsy. Conditions like diaphyseal aclasis, achondroplasia, neurofibromatosis, skeletal dysplasias, hereditary sensory motor neuropathies, etc. Prenatal History History of rubella, toxoplasmosis, cytoplasmosis, herpes or any other maternal infections, drug intake, injury, exposure to radiation and vaginal bleeding during pregnancy should be elicited. Examination A child should be examined in the presence of his/her parents as the child feels comfortable in their presence. Radiographs were done elsewhere and the child was referred to us as a congenital hip dislocation. Further, questioning revealed reduced movements of left lower limb during that period. Examination of totally uncooperative child may be done forcefully as the last resort; sometimes video done by the parents gives useful information. Specific Examination Neonatal Screening the common conditions presenting in neonatal period include traumatic conditions like birth fractures, congenital conditions and neonatal infections. The algorithm for examination includes upper and lower limb injuries and congenital deformities. Inability to move a limb can be due to paralysis or pseudoparalysis; birth fractures need to be differentiated from obstetric brachial plexus palsy. An abduction and external rotation deformity of hip may indicate an underlying effusion in the hip. Adduction deformity of hip is seen in long-standing cases of infective hip pathology. Bilateral genu valgum or varum may be physiological depending on the age of the child, due to rickets or skeletal dysplasia. This 12-year-old girl hit a bench in the school, 3 weeks prior to appearance of swelling and pain. Palpate for any swelling, thickening of bone, tenderness or local rise of temperature. Lateral thrust of the knee, short stature, suspected metabolic bone disease and asymmetrical deformity always requires further evaluation. Increased femoral torsion as well as increased tibial torsion may be normal till 9 years of age; this usually resolves to normal adult values by 8­9 years of age spontaneously. This is due to loss of elasticity of muscle due to fibrosis (fixed length phenomena) Contractures, Joint Laxity and Range of Motion Joint range of motion can be measured by eyeballing technique or more accurately using a goniometer. Contractures as well as loss of motion at a joint can be postural, or due to muscle imbalance. Gait: Observe all the phases of gait including stance phase and the swing phase for asymmetry, irregularity or antalgic gait. A Trendelenburg gait is seen in developmental dislocation of hip, slipped capital femoral epiphysis or sometimes postseptic sequelae with destruction of femoral head. Other common causes of abnormal gait include Perthes disease, cerebral palsy, arthrogryposis multiplex congenita, and meningomyelocele. Measurement in upper limb is taken from angle of acromion to lateral epicondyle as the arm length. Clinical measurement of limb length is difficult with the fixator on due to presence of wires References 1. Tuberculosis of the Skeletal System (Bones, Joints, Spine and Bursal Sheaths), 3rd edn. A study of the angle of gait, tibial torsion, knee angle, hip rotation, and development of the arch in normal children. Note the abnormal body proportions as well as severe genu varum of tibia from medial joint line of knee to tip of medial malleolus. Body Proportions the ratio of trunk to lower limbs (top of head to symphysis pubis/symphysis pubis to sole of foot) is one at age of 10 years in a normal child. Obstetrical brachial plexus injuries: incidence, natural course and shoulder contracture. Considering the presence or absence of contact for the limb being considered, the gait cycle is divided into two phases: 1. Introduction the normal human gait provides a smooth energy efficient transfer of the body through space. Bipedal gait sacrifices stability and speed to free the upper extremities for prehensile functions. Biomechanics the normal bipedal gait is described as an interplay between loss and recovery of balance in which the center of gravity of the body located anterior to the second sacral vertebra shifts constantly. There is a cyclical process involving transformation of potential to kinetic energy and the use of kinetic energy to accelerate the body and create potential energy throughout the gait cycle. By minimizing the excursion of center of gravity: this is achieved by synchronized pelvic, hip, knee and ankle motions. In above knee amputee gait, the energy cost is approximately double than that of nonamputee gait due to loss of this mechanism. By external moments to stabilize joints during gait cycle: In midstance phase, eccentric contraction of soleus places the ankle in proper position due to which the ground reaction force vector falls in front of the knee, generating an extension moment in which stability at knee is provided by the ligaments. Similarly, at the hip joint, the ground reaction force vector falls behind the joint center to generate an extension moment, which is stabilized by anterior hip ligaments. By the efficient transfer of energy between body segments:1,2 the two-joint muscles such as the rectus femoris, which can generate power when serving as a hip flexor while simultaneously absorbing power in its role as a knee extensor Stance Phase Stance phase constitutes the first 60% of the gait cycle. They are: (i) heel-strike, (ii) foot-flat, (iii) heel-off, (iv) knee-bend and (v) toe-off. The smaller arrows represent the net internal moment that are generated by the muscles crossing each joint the stance phase contains two periods of "double support", when both limbs are in contact with the floor. The first period occurs immediately after the initiation of stance phase, and the second just before the end of stance. This is one of the energy-efficient mechanisms often lost in pathologic gait deviations. Tibial advancement over the foot constitutes the second or ankle rocker and is controlled by an internal ankle plantar flexion moment (small arrow) Swing Phase the swing phase constitutes the remaining 40% of the gait cycle and begins at the point where the limb is unloaded and the foot comes-off the ground. Terminal swing: It is the deceleration period, which occupies final 10% of swing phase. Foot clearance and correct positioning for the initiating of the subsequent stance phase are critical components of swing phase. The limb is advanced from behind the body to in front of the body reaching out to take the next step. The functioning assessment of gait can be done by considering the kinematics and kinetics of anatomic areas such as joints and body segments. Heel rocker begins at initial contact (heel strike) and extends through the loading response. The planter flexion seen in the loading response is resisted by internal moment generated by ankle dorsiflexors muscle. The deceleration of ankle plantar flexion contributes to tibial advancement and shock absorption. The toe-off motion occurs before the opposite heel strike, creating two periods of double float. The dorsiflexion at ankle is resisted by the internal moment generated by the ankle plantar flexor muscles.

Just deep to the investing layer is the muscular portion of the pretreacheal layer diabete x obesidade discount glipizide 10 mg buy, part of which has been rem oved to display the visceral portion of the pretracheal layer diabetes diet type 1 recipes order glipizide 10 mg without prescription. The neurovascular structures are surrounded by a condensation of the cervical fascia called the carotid sheath diabetes test kit carrying case purchase glipizide with paypal. The deepest layer of the deep cervical fascia diabete quebec cheap glipizide 10 mg buy online, called the prevertebral layer diabetes medications video buy cheap glipizide 10 mg online, is visible posteriorly on the left side. These fascia-bounded connective-tissue spaces in the neck are important clinically because they provide routes for the spread of in am m atory processes, although the in am m ation m ay (at least initially) rem ain con ned to the a ected compartm ent b Left lateral view. This m idsagit tal section shows that the deepest layer of the deep cervical fascia, the prevertebral layer, directly overlies the vertebral colum n in the m edian plane and is split into t wo parts. With tuberculous osteomyelitis of the cervical spine, for example, a gravitation abscess m ay develop in the "danger space" along the prevertebral fascia (retropharyngeal abscess). The carotid sheath is located farther laterally and does not appear in the m idsagit tal section. Skin and it s subcutaneous tissue are under tension explaining why a sm all, round needle hole can result in a sm all longish slit in the skin aligned along the tension lines in the area around the incision. To prom ote swift healing and reduce visible scarring, incisions in the head region are aligned along these tension lines. Knowledge of the tension line pat terns in the face and neck are critically important in plastic surgery to m inim alize scarring in these highly visible areas. If the pressure of a ngertip placed at these exit point s causes pain, the respective branch of the trigem inal nerve is stim ulated. If the lymph nodes are enlarged, the cause can be related to in am m ation or a tum or in the tributary area of the nodes. During a clinical exam ination of the head, these lymph node groups are always palpated. Overview Ante rior ce rvical re gion · Subm andibular triangle ­ Submandibular lymph nodes ­ Submandibular gland ­ Hypoglossal nerve ­ Parotid gland (posterior) · Carotid triangle ­ Carotid bifurcation ­ Carotid body ­ Hypoglossal nerve · Muscular triangle ­ Thyroid gland ­ Larynx ­ Trachea ­ Esophagus · Subm ental triangle ­ Submental lymph nodes Sternocleidomastoid region b Sternocleidom astoid Subm andibular triangle Subm ental triangle Carotid triangle Anterior cervical region Trapezius Muscular triangle a Lesser supraclavicular fossa Lateral cervical region, occipital triangle Om oclavicular (subclavian) triangle · · · · · Sternocleidom astoid muscle Carotid artery Internal jugular vein Vagus nerve Jugular lymph nodes Lateral cervical region C Regions of the neck (cervical regions) a Right lateral view; b Left posterior view. Conversely, pathological changes in one region can be referred to the underlying anatom ical structure. In the case of torticollis, the sternocleidom astoid m uscle is shortened- ost m com m only as a result of intrauterine m alposition in infants. The head is tilted toward the affected side and is slightly rotated toward the opposite side. Without therapy (physical therapy/surgery) torticollis secondarily leads to asym m etrical growth of spinal colum n and facial skeleton. The e ect s of the cranial asym m etry m ay include a convergence of the facial planes toward the a ected side (see lines). E Retrosternal g oiter (after Hegglin) A goiter that arises from the inferior poles (see p. F Assessing the central venous pressure in the neck in a semi-upright position Norm ally the cervical veins are collapsed in the sit ting position. But in a patient with rightsided heart failure, there is dim inished venous return to the right heart, causing distention of the jugular veins. The extent of the venous congestion is indicated by the level of pulsations in the external jugular vein (the "venous pulse," upper end of the blue line). The higher the level of jugular pulsation, the greater the backup of blood into the vein. Understanding the clinically important developm ent of the cleft lip, jaw, and palate (c) requires knowledge of facial developm ent. The surface ectoderm of the 1st branchial arch invaginates to form the stom odeum which later connect s to the endoderm al epithelium of the oral cavit y. The facial outline develops from facial prom inences, the tissue of which arises from the 1st branchial arch or neural crest m esenchym. The m andibular processes are located caudal to the stom odeum with the m axillary processes loca- ted lateral to it. Superom edial to the m axillary processes are the m edial and lateral nasal process. The m edial nasal processes have fused along the m idline and their inferolateral m argins contact the m axillary processes on either side. B Facial prominences and their derivatives (after Sadler) Facial prominence Derivative Frontal process Maxillary process Medial nasal process Lateral nasal process Mandibular process Forehead, bridge of nose, medial and lateral nasal process Cheeks, lateral parts of upper lip Philtrum, tip of the nose and ridge of the nose Nasal wing Lower lip 8 Hea d and Neck 1. Overview Interm axillary bone Philtrum Interm axillary bone with 4 incisors Prim ary palate a Maxillary processes b fused palatine bones (secondary palate) C Intermaxillary segment (after Sadler) Caudal view of palate. The bone of the prim ary palate fuses with the m axillary processes (secondary palate) and is no longer a separate bone in adults. The palatine bones and the m axillary processes have fused with the prim ary palate. The surface epithelium form s oral m ucosa that lines the roof of the oral cavit y. A cleft lip that extends up to the nose (harelip) occurs on the left side if the tissue of the upper lip does not fuse on the left side. A cleft lip and m axilla occurs if the fusion of prim ary and secondary palates on the left side does not occur. Incomplete fusion of the prim ary and secondary palates on both sides result s in an isolated cleft palate. This simpli ed schem atic of the circulatory system of a lancelet sh illustrates the basic relation bet ween the vascular tree and the branchial arches in chordates, including the vertebrates. Oxygendepleted blood (in blue) is pumped rostrally (toward the head) through a ventral aorta to a series of branchial arches, where it passes through gills, picks up oxygen (red), and then is distributed to the body (com pare this paired, segm ental arterial arch with the thoracic segm ent in hum ans). A sim ilar anatom ical organization and circulatory pat tern is seen in the hum an em bryo, where the gills and branchial arches are transform ed into pharyngeal arches which develop into various structures in the head and neck. Errors during this developm ental process give rise to a series of relatively com m on anatom ical anom alies in the neck (see G). C Derivation of musculoskeletal structures from the pharyngeal arches in the adult (after Sadler) Left lateral view. Besides the cartilaginous rudim ent s of the skeleton (see labels), the m uscles and their associated nerves can be traced em bryologically to speci c pharyngeal arches. The rst pharyngeal arch gives rise to the m asticatory m uscles, the mylohyoid m uscle, the anterior belly of the digastric m uscle, the tensor veli palatini, and the tensor t ympani. The second pharyngeal arch gives origin to the m uscles of facial expression, the posterior belly of the digastric, the st ylohyoid m uscle, and the stapedius. The fourth and sixth pharyngeal arches give rise to the cricothyroid m uscle, levator levi palatini, constrictor pharyngis, and the intrinsic m uscles of the larynx. The nerve supply to the m uscles can also be explained in term s of their em bryologic origins (see D). The hum an em bryo has four pharyngeal arches separated by intervening pharyngeal cleft s. Like other tissues of the pharyngeal arches, they m igrate with further developm ent to form various skeletal and ligam entous elem ents in the adult (see C). Overview Pharyngeal arch artery Pharyngeal arch nerve Cartilaginous elem ent Pharyngeal pouch Pharyngeal cleft Tym panic cavit y Endoderm External auditory canal First pharyngeal arch Second pharyngeal arch Third pharyngeal arch Fourth pharyngeal arch Palatine tonsil Parathyroid glands, superior pair Parathyroid glands, inferior pair Ultim obranchial body Eustachian tube Foram en cecum Thyroid gland Thym us Mesenchym e Laryngotracheal Ectoderm groove E Internal structure of the pharyng eal arches (after Sadler) Anterior view (plane of section shown in B). The pharyngeal arches are covered externally by ectoderm and internally by endoderm. Each pharyngeal arch contains an arch artery, an arch nerve, and a cartilaginous elem ent, all of which are surrounded by m esoderm al and m uscular tissue. The external furrows are called the pharyngeal cleft s, and the internal furrows are called the pharyngeal pouches. The endoderm al lining of the pharingeal pouches develops into endocrine glands of the neck, a process which m ay involve signi cant m igration of cells from their site of origin. F Mig ratory movements of the pharyng eal arch tissues (after Sadler) Anterior view. During em bryonic developm ent, the epithelium from which the thyroid gland is form ed m igrates from it s site of origin on the basal m idline of the tongue to the level of the rst tracheal cartilage, where the thyroid gland is located in postnatal life. As the thyroid tissue buds o from the tongue base, it leaves a vestigial depression on the dorsum of the tongue, the foram en cecum. The parathyroid glands are derived from the fourth pharyngeal arch (superior pair) or third pharyngeal arch (inferior pair), which also gives origin to the thym us. The ultim obranchial body, whose cells m igrate into the thyroid gland to form the calcitonin-producing C cells or parafollicular cells, is derived from the fth, vestigial, pharyngeal arch. The lat ter arch is the last to develop and is usually considered part of the fourth pharyngeal arch. The external auditory canal is derived from the rst pharyngeal cleft, the t ym panic cavit y and eustachian tube from the rst pharyngeal pouch, and the palatine tonsil from the second pharyngeal pouch. Median cysts and stulas in the neck (a, b) are rem nant s of the thyroglossal duct. Lateral cysts and stulas in the neck are anom alous rem nant s of the ductal portions of the cervical sinus, which form s as a result of tissue m igration during em bryonic developm ent. If epithelium -lined rem nant s persist, neck cyst s (right) or stulas (left) m ay appear in postnatal life (c). A complete stula opens into the pharynx and onto the surface of the skin, whereas an incomplete (blind) stula is open at one end only. The external ori ce of a lateral cervical stula is t ypically located at the anterior border of the sternocleidom astoid m uscle. This view was selected as an introduction to the skull because it displays the greatest num ber of cranial bones (indicated by di erent colors in B). The individual bones and their salient features as well as the cranial sutures and apertures are described in the units that follow. The chapter as a whole is intended to fam iliarize the reader with the nam es of the cranial bones before proceeding to ner anatom ical details and the relationships of the bones to one another. Bones, Liga ments, a nd Joints Temporal bone, squam ous part Frontal bone Parietal bone Sphenoid bone, greater wing Ethm oid bone Lacrim al bone Nasal bone Zygom atic bone Maxilla Occipital bone Mandible Temporal bone, petrous part Temporal bone, t ympanic part B Lateral view of the cranial bones Left lateral view. The bones are shown in di erent colors to dem onstrate m ore clearly their extent s and boundaries. C Bones of the neurocranium (g ray) and viscerocranium (orange) Left lateral view. E Bones of the neurocranium and viscerocranium Neurocranium (gray) Viscerocranium (orange) · Front al bone · Sphenoid bone (excluding the pterygoid process) · Temporal bone (squam ous part, petrous part) · Pariet al bone · Occipit al bone · Ethm oid bone (cribriform plate) · Auditory ossicles · Nasal bone · Lacrim al bone · Ethmoid bone (excluding the cribriform plate) · Sphenoid bone (pterygoid process) · Maxilla · Zygom atic bone · Tem poral bone (t ym panic part, st yloid process) · Mandible · Vom er · Inferior nasal turbinate · Palat ine bone · Hyoid bone (see p. The bones of the skull either develop directly from m esenchym al connective tissue (intram em branous ossi cation, gray) or form indirectly by the ossi cation of a cartilaginous m odel (enchondral ossi cation, blue). Elem ents derived from intram em branous and endochondral ossi cation (desm ocranium and chondrocranium respectively) m ay fuse together to form a single bone. This explains why congenital defect s of intram em branous ossi cation a ect both the skull and clavicle (cleidocranial dysostosis). F Bones of the desmocranium and chondrocranium Desmocranium (gray) Chondrocranium (blue) · · · · · · · · Nasal bone Lacrimal bone Maxilla Mandible Zygom atic bone Frontal bone Parietal bone Occipital bone (upper part of the squam a) · Temporal bone (squam ous part, t ympanic part) · Palatine bone · Vomer · Ethmoid bone · Sphenoid bone (excluding the medial plate of the pterygoid process) · Tem poral bone (petrous and m astoid part s, st yloid process) · Occipital bone (excluding the upper part of the squam a) · Inferior nasal turbinate · Hyoid bone (see p. The bony m argins of the anterior nasal aperture m ark the start of the respiratory tract in the skull. The nasal cavit y, like the orbit s, contains a sensory organ (the olfactory m ucosa). The anterior view of the skull also displays the three clinically important openings through which sensory nerves pass to supply the face: the supraorbital foram en, infraorbital foram en, and m ental foram en (see p. Bones, Liga ments, a nd Joints Frontal bone Parietal bone Sphenoid bone, greater wing Nasal bone Ethm oid bone, m iddle nasal concha Inferior nasal concha Temporal bone Sphenoid bone, greater wing Zygom atic bone Maxilla Frontal sinus Ethm oid cells Sphenoid sinus Maxillary sinus Nasal cavit y Mandible B Cranial bones, anterior view Frontonasal pillar Horizontal zygom atic pillar C Paranasal sinuses: pneumatization lightens the bone Anterior view. These cavities, called the paranasal sinuses, com m unicate with the nasal cavit y and, like it, are lined by ciliated respiratory epithelium. In am m ations of the paranasal sinuses (sinusitis) and associated complaint s are very com m on. Because som e of the pain of sinusitis is projected to the skin overlying the sinuses, it is helpful to know the projections of the sinuses onto the surface of the skull. These pillars develop along the principal lines of force in response to local m echanical stresses. In visual term s, the fram e-like construction of the facial skeleton m ay be likened to that of a fram e house: the paranasal sinuses represent the room s while the pillars (placed along m ajor lines of force) represent the supporting colum ns. The m axilla is separated from the upper facial skeleton, disrupting the integrit y of the m axillary sinus (low transverse fracture). The m ain fracture line passes through the orbit s, and the fracture m ay additionally involve the ethm oid bones, frontal sinuses, sphenoid sinuses, and zygomatic bones. The cranial sutures are a special t ype of syndesm osis (= ligam entous at tachm ents that ossify with age, see F). The outer surface of the occipital bone is contoured by m uscular origins and insertions: the inferior, superior, and suprem e nuchal lines. The external occipital protuberance serves as an anatom ical reference point: It is palpable at the back of the head. Sagit tal suture: scaphocephaly (long, narrow skull) Coronal suture: oxycephaly (pointed skull) Frontal suture: trigonocephaly (triangular skull) Asym m etrical suture closure, usually involving the coronal suture: plagiocephaly (asym m etrical skull). When the brain becom es dilated due to cerebrospinal uid accum ulation before the cranial sutures ossify (hydrocephalus, "water on the brain"), the neurocranium will expand while the facial skeleton rem ains unchanged. The at cranial bones m ust grow as the brain expands, and so the sutures bet ween them m ust rem ain open for som e tim e (see F). In the neonate, there are areas bet ween the still-growing cranial bones that are not occupied by bone: the fontanelles. They close at di erent tim es (the sphenoid fontanelle in about the 6th m onth of life, the m astoid fontanelle in the 18th month, the anterior fontanelle in the 36th m onth). The posterior fontanelle provides a reference point for describing the position of the fetal head during childbirth, and the anterior fontanelle provides a possible access site for drawing a cerebrospinal uid sample in infant s. F Ag e at w hich the principal sutures ossify Suture Age at ossi cation Frontal suture Sagit tal suture Coronal suture Lambdoid suture Childhood 20­30 years of age 30­40 years of age 40­50 years of age 17 Hea d and Neck 2. Parietal bone Granular foveolae (for arachnoid granulations) A Exterior (a) and interior (b) of the calvaria the external surface of the calvaria (a) is relatively sm ooth, unlike it s internal surface (b).

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