Spontaneous Uterine Leiomyoma Torsion: A Challenging Differential Diagnosis for Radiologists.

Uterine leiomyomas are very common gynaecological benign tumours. Spontaneous torsion of a uterine subserosal leiomyoma is a rare cause of acute lower abdominal pain and should be treated immediately with surgery. We report a case of an enlarged subserosal leiomyoma that was first detected by computed tomography (CT) and further confirmed by laparoscopic surgery to be a subserosal leiomyoma with torsion. LEARNING POINTS Spontaneous torsion of a uterine subserosal leiomyoma is a rare cause of acute lower abdominal pain.Contrast-enhanced CT of the pelvis reveals changes in size, abnormal or absent enhancement of the leiomyoma, and congestion of the vascular pedicle at the site of torsion.CT imaging can help in the accurate diagnosis of leiomyoma torsion.