What is "prune belly syndrome"

n. A rare genetic birth defect, mainly in males, affecting the urinary system and often accompanied by wrinkled skin on the abdomen.

Prune belly syndrome, also referred to as abdominal muscle deficiency syndrome, congenital absence of the abdominal muscles, Eagle-Barrett syndrome, Obrinsky syndrome, Fröhlich syndrome, or, rarely, triad syndrome, is a rare, genetic birth defect affecting about 1 in 40,000 births. About 97% of those affected are male. Prune belly syndrome is a congenital disorder of the urinary system, characterized by a triad of symptoms. The syndrome is named for the mass of wrinkled skin that is often (but not always) present on the abdomen of those with the disorder.