Urothelial carcinoma arising from an ovarian mature cystic teratoma

AbstractObjectiveOvarian mature cystic teratomas with malignant transformation are rare, and squamous cell carcinoma is the most common pathological entity. Among these malignant transformations, urothelial cell carcinoma is rare.Case ReportWe report a woman presenting with a huge pelvic cystic mass, favoring a right ovarian mature cystic teratoma with malignant transformation, based on magnetic resonance imaging, who was successfully treated with surgery.ConclusionThe final pathology confirmed concomitant malignant transformation of urothelial carcinoma