Ayako Ono MD, Presenter: Nothing to Disclose

Takashi Koyama MD, PhD, Abstract Co-Author: Nothing to Disclose

Emiko Morimoto MD, Abstract Co-Author: Nothing to Disclose

Takuya Maekura MD, Abstract Co-Author: Nothing to Disclose

Toshiki Shiozaki MD, Abstract Co-Author: Nothing to Disclose

Giro Todo MD, Abstract Co-Author: Nothing to Disclose

The purpose of this exhibit is 1. to review MRI features of uterine malignancies. 2. to show how some of uterine malignancies can simulate benign conditions and be a diagnostic pitfalls. 3. to discuss the differential points to accurately distinguish these malignancies from benign conditions. Teaching Points: 1. Leiomyosarcomas (LMS) with extensive hemorrhagic necrosis or myxoid change may be confused with degenerated myoma. 2. Infiltrative myometrial tumors, such as endometrial stromal sarcomas (ESS) and secondary tumors including lymphomas and metastatic tumors may masquerade adenomyosis. Involvement of the adnexa or pelvic nodes is a clue to suspect malignancy. 3. Endometrial tumors arising from adenomyosis or polyp should be distinguished from preexisting benign conditions. 4. Adenosarcomas often cause diagnostic challenge for both radiologists and pathologists as they closely resemble polyp. 5. Diffusion-weighted images may also play a role for differentiation of uterine malignancies.

1. LMS with extensive hemorrhagic necrosis 2. Myxoid LMS 3. ESS simulating adenomyosis or leiomyoma 4. Secondary tumors (lymphoma/ metastasis) 5. Endometrial carcinomas arising from polyp or adenomyosis 6. Mixed epithelial tumors (adenosarcoma, carcinosarcoma)

http://abstract.rsna.org/uploads/2014/14001906/14001906_5e8a.pdf

Ono, A, Koyama, T, Morimoto, E, Maekura, T, Shiozaki, T, Todo, G, MR Imaging Appearances in Uterine Malignancies Simulating Benign Conditions.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14001906.html