terine carcinosarcomas are uncommon malignant tumors, characterized histologically by the presence of both malignant glandular and sarcomatous components.1 They are also called malignant mixed müllerian tumors and usually appear in postmenopausal women.1 Most of them have a highly aggressive behavior, and their prognosis used to be very poor, even in stage I.2,3 Traditionally, these tumors have been considered a subtype of uterine sarcoma; however, recent data have shown that most carcinosarcomas have a monoclonal origin. 4Specific preoperative diagnosis is often very difficult because, in most instances, an endometrial biopsy specimen can indicate either carcinoma or sarcoma. 2 We report a case of uterine carcinosarcoma arising from an endometrial polyp in a postmenopausal woman evaluated by 3-dimensional (3D) power Doppler angiography and positron emission tomography/computed tomography (PET/CT). Case ReportA 60-year-old multiparous postmenopausal woman was admitted to the Department of Gynecology at the Caracas University Hospital with postmenopausal bleeding and uterine prolapse. Her medical history was unremarkable. Uterine prolapse was confirmed at physical examination. Transvaginal sonography was performed and showed a heterogeneous 24-mm-thick endometrial stripe. The cervix was apparently normal, and the myometrialendometrial interface was well defined (Figure 1). Threedimensional power Doppler angiography was performed subsequently and showed a highly vascularized lesion with a main feeding vessel arising from the uterine fundus with an abnormal branching pattern, aneurysmatic dilatations, and distribution of vessels inside the uterine lesion (Figure 2). A polypoid malignant lesion with no myometrial invasion was suspected.