Heterotopic Mesenteric Ossification, Co-incidentally found with a Ruptured Tubo-ovarian Abscess: A Case Report

Heterotopic mesenteric ossification is a rare bone-like lesion located inside the abdominal cavity. Its etiology is unclear but most of the patients had a history of abdominal trauma or surgical operation.In this study, we present the case of a 29-year old woman admitted with acute abdominal pain and fever that underwent emergency laparotomy. She had a history of recurrent pelvic inflammatory disease and surgical appendectomy. During a laparotomy, a massive left tubo-ovarian abscess was seen and drained out. There was also a hard mass-like lesion measuring 2×1cm attached to the mesentery that was excised and sent for pathologic evaluation. The patient was discharged in good general condition.Microscopic evaluation of the mass in hematoxylin and eosin stained section revealed a structure consisting of bony trabeculae and fibroblastic proliferation.This case represents a rare simultaneous occurrence of mesenteric ossification with a ruptured tubo-ovarian abscess that due to a history of recurrent inflammatory disease introduce inflammatory prosess as a possible cause of heterotopic mesenteric ossification.