Torsion of a mucocele of the veriform appendix: report of a case.

Mucocele of the appendix refers to an appendix that is distended by mucus and transformed in a mucus-filled sac. Appendicular torsion is rare. Primary and secondary forms of appendicular torsion are known. Our patient presented to the emergency department with complaints mimicking acute appendicitis. Imaging with computed tomography and ultrasound showed a cystic lesion most likely originating from the right ovary. The veriform appendix was located close to this lesion and seemed to be distended. During diagnostic laparoscopy, a torsion of the veriform appendix due to a mucocele was found and an appendectomy was performed. Histopathological analysis confirmed the diagnosis. Torsion of the vermiform appendix is most often diagnosed intra-operatively. Pre-operative radiologic imaging is often not useful in the detection of appendicular abnormalities other than acute appendicitis. The treatment consists of detorsion and appendectomy.