A phalanx abnormality in a newborn

Case report : A two-month-old boy was referred to the dermatology outpatients for a nail disorder since birth. Surgical correction of a pyloric stenosis was his only medical history. Her mother had been treated with Metformin for a hyperinsulinism before the conception and during the pregnancy. The parents are not consanguineous. The clinical examination revealed anonychia of the right second toenail and micronychia of the left one. Left finger index showed micronychia and seemed shorter. Hai and eyebrows were normal. Patellas were palpated. X-ray was made and highlighted an insufficient development of the extremities of second fingers and toes.