Frozen abdomen complicated with midline heterotopic peritoneal ossification: case report.

Background: Heterotopic ossification consists in abnormal differentiation of mesenchymal cells into osteoblastic cells, which may occur in the abdominal cavity.

Case Report: A 54-year-old male who presents with small bowel obstruction, performing a laparotomy, adhesiolysis, and managed with an open abdomen with Bogota bag; the abdominal wall was closed on the 5 post-operative day. Due to recurrent symptoms of intestinal obstruction, he required a re-laparotomy after 14 days, finding a frozen abdomen with midline calcified peritoneum.