<prompt> Webbing of neck, increased carrying angle, low posterior hair line and sho fouh metacarpal are characteristics of:Klinefelter syndromeTurner syndromeCri du chat syndromeNoonan syndrome  <response>: Answer is B Turners Syndrome : Noonan syndrome presents with most features similar to Turners Syndrome. Webbing of neck, increased carrying angle, low hair line are present in both Noonans and Turners Syndrome but sho fouh metacarpal is characteristic of Turners Syndrome only. Term Noonan syndrome has been applied to males and females who present with phenotypic features of Turners Syndrome but have a normal Karyotype 46X, Y or 46 XX Turners Syndrome Noonans Syndrome Defect in X chromosome Autosomal dominant disorder Karyotype is XO Karyotype is normal 46 X, X or 46 X, Y Phenotypic females only Q female sex only Phenotypic Males or females seen in both sexes Manifestations Manifestations Sho stature Sho stature Webbed neck Webbed neck Low posterior hair line Low posterior hair line Characteristic facies - Hypeelorism - Epicanthus - Slanted palpebral fissures - Ptosis - Micrognathia - Ear abnormalities Characteristic facies - Hypeelrism - Epicanthus - Slanted palpebral fissures - Ptosis - Micrognathia - Ear abnormalities Cubitus valgus Cubitus valgus Borad chest with widely spaced nipples Pectus carinatum Pectus excavatum Cardiac defect : - Most commonly coarctation of aoa and bicuspid aoic valve Cardiac defect : - Most common cardiac defect is pulmonary valvular stenosis, Hyperophic cardiomyopathy, ASD Sensorineural hearing loss Sensorineural hearing loss Sho fouh metacarpal ? No mental retardation Mental retardation present 