Fetal cystic fibrosis presenting as dystocia due to midgut volvulus with lethal perforation.

Fetal or neonatal volvulus is a rare event and is usually associated 
with an anatomic defect. Massive abdominal distension secondary to a ruptured 
or unruptured volvulus has never been reported as a cause of 
obstructed labor. The present report documents such a case, secondary to 
chemical peritonitis resulting from a ruptured midgut volvulus. This case demonstrates 
an unusual presentation of presumed cystic fibrosis with meconium ileus and 
volvulus which led to ischemic infarction and perforation of the small 
bowel. This case likewise emphasizes the need to consider the presence 
of other fetal anomalies, such as omphalocele or gastroschisis, when the 
usual maneuvers fail to relieve shoulder dystocia. 