Torsion of a large subserosal fibroid along with omental torsion adherent to it: a rare cause of acute abdomen

A woman in her 30s presented to emergency with complaints of acute lower abdominal pain for 3 days, not associated with any menstrual, bowel or urinary symptoms. Examination revealed an abdominopelvic mass corresponding to an 18-week gravid uterus with diffuse tenderness and guarding over her lower abdomen. The patient was a follow-up case of subserosal fibroid uterus, chronic kidney disease stage 4 and rheumatic heart disease on anticoagulants. Fibroid degeneration or torsion was suspected. Ultrasound revealed a large posterior wall subserosal fibroid with free fluid in the pelvis. As findings did not suggest degeneration or pedunculated fibroid, noncontrast CT was done, which showed a similar mass with a pedicle arising from the uterine fundus with free fluid with no other evident cause of acute abdomen. The patient was taken up for emergency laparotomy. Intraoperatively, it was found to be a case of subserosal fibroid with greater omentum adhered to it and twisted around its axis about eight times. This case is being reported to highlight a rare cause of acute abdomen.