Laparoscopic Treatment of a Retroduodenopancreatic Endometriotic Cyst Observed Postpartum.

Endometriosis occurs in 5%-10% of fertile women, usually in the pelvic region, such as the ovaries, uterine ligaments, pelvic peritoneum, and rectovaginal septum. A mesenteric endometriotic cyst is an exceptional observation and difficult to diagnose preoperatively. We report a case of a large mesenteric endometriotic cyst treated by laparoscopy. A 21-year-old Caucasian woman was admitted as an emergency to our Academic Hospital on the 30th day postpartum for abdominal pain and a palpable epigastric mass. A CT scan revealed a mass measuring 7.5 × 5.5 cm showing a fluid content, located below the pancreas. A preoperative diagnosis of mesenteric cyst was made and confirmed by MRI. A dissection of the mass from the inferior vena cava, pancreas, and duodenum was achieved by a laparoscopic approach. During the blunt dissection, avoiding any spillage, the cyst was aspirated to preserve a safe cleavage plane with the lower third of the duodenum showing tenacious adhesions to the mass. Histology revealed an endometriotic cyst of the mesenterium. To our knowledge, this is the first case reported in the literature of laparoscopic treatment of a retroduodenopancreatic endometriotic cyst observed postpartum. In dedicated centers, laparoscopic management could be the gold standard.