Cystic fibrosis, pancreatic sufficiency and distal intestinal obstruction syndrome: a report of four cases.

Distal intestinal obstruction syndrome (DIOS), formerly termed meconium ileus equivalent, is usually considered to be unique to cystic fibrosis (CF) patients who have steatorrhoea. We report four CF patients without steatorrhoea ("pancreatic sufficient") who have had repeated episodes of faecal loading indistinguishable from DIOS.