Mesenteric hibernoma in a pediatric patient present on prenatal ultrasound

A 15-month old male presented with several months of abdominal distension. After undergoing thorough workup, he was found to have an intraabdominal mass on imaging. He underwent exploratory laparotomy and resection of a mesenteric mass along with a loop of associated small bowel. On pathology, the mass was consistent with a hibernoma. In retrospect, the mass may have been present on prenatal ultrasound.