Solitary intestinal fibromatosis: a rare cause of neonatal obstruction.

Solitary intestinal fibromatosis (SIF) is an unusual cause of neonatal intestinal obstruction. A fibromatosis located in the first part of the duodenum, close to the pylorus, was associated with a focus of heterotopic pancreas and mimicked congenital pyloric stenosis. It illustrates the difficulties encountered in the diagnosis and surgical management of this condition.