Prune perineum syndrome: report of a second case.

A child is reported with a constellation of anomalies which include acetabular dysplasia with bilateral dislocated hips, persistent cloaca, hypoplastic kidney, two umbilical vessels, anal atresia and no obvious external genitalia. These anomalies are strikingly similar to a case reported by Peeden et al ('79) which was referred to as prune perineum. A discussion on possible underlying cause(s) of caudal dysplasia is included.