Maternal death from severe retroperitoneal fibrosis.

Idiopathic retroperitoneal fibrosis is uncommon in pregnancy. We have described the case of a pregnant patient with a benign retroperitoneal spindle cell tumor involving the distal duodenum, right ureter, and right iliac artery and vein. She was treated with a left ureteral stent and a right percutaneous nephrostomy. Ultimate cause of death was electrolyte imbalance due to bowel obstruction.