Webbing of neck increased carrying angle, low posterior hairline and short fourth metacarpal are characteristics of –

Noonan syndrome presents with most features similar to Turner's Syndrome. Webbing of the neck increased carrying angle, the low hairline is present in both Noonan's and Turner's Syndrome but short fourth metacarpal is characteristic of Turner's syndrome only. Turner's syndrome Defect in chromosome karyotype is XO Phenotypic females only (females sex only) Manifestations Short Stature Webbed neck      Low posterior hairline Characteristic facies Micrognathia Ear abnormalities Cubitus valgus Board chest with widely spaced nipples Cardiac defect : Most commonly coarctation of the aorta and bicuspid aortic valve Sensorineural hearing loss Short fourth metacarpal No mental retardation Lymphedema of hand & feet