Congenital ascites due to mesenteric vessel constriction caused by malrotation of the intestines.

A newborn premature girl with congenital, non-chylous ascites is presented. The ascites recurred although laparocentesis was performed three times. The ascites was probably due to a superior mesenteric vein constriction caused by a malrotation of the intestines. After division of the Ladd-bands no ascites recurred. Non-chylous, congenital ascites may have a surgically treatable cause.