Accessory spleen presenting as adnexal mass.

Pelvic splenic ectopia is a very rare entity, often unsuspected preoperatively. We report a case of an ectopic spleen presenting as an adnexal mass in a middle-aged woman. Diagnosis was achieved intraoperatively, and confirmed pathologically. Pelvic ectopic spleen should be considered in the differential diagnosis of adnexal masses.