Benign Cystic Mesothelioma- Masquerading as Mesenteric Cyst

We report a case of benign cystic mesothelioma which clinically and radiologically appeared to be a mesenteric cyst but histopathology showed it to be a benign cystic mesothelioma. We also noted it is an uncommon condition in males. It is a rare condition that arises from abdominal peritoneum. Benign cystic mesothelioma usually affects premenopausal women and is extremely rare in men. Many factors such as insult to peritoneum like previous abdominal surgery, endometriosis, PID are suspected to contribute to its development. The main management is complete surgical excision but as in this case it was adherent to vital structures only 80% of cyst could be excised. Malignant transformation is rare.