Aplasia of pectoralis major muscle and renal anomalies.

We describe two patients with aplasia of the pectoralis major muscle and renal anomalies. We think such an association, which has been reported previously, represents a new congenital malformation, probably not a syndrome but an acro-pectoro-renal field defect. We recommend renal ultrasonography be done on all children with aplasia of the pectoralis major.