We report MR imaging findings of a rare case of endocervical mucinous borderline tumor (MBT) involving the cul-de-sac and left fallopian tube arising from extensive pelvic endometriosis with pathologic correlation in a 35-year-old woman presented with vague pelvic pain. Endocervical MBT is a type of endometriosis-associated carcinoma. Imaging findings of endocervical MBT are unilocular or oligolocular cystic lesions with enhancing mural nodules, which are different from those of the more common intestinal type MBT.
Adult ; Cystadenoma, Mucinous/*diagnosis/etiology ; Diagnosis, Differential ; Endometriosis/complications/*diagnosis ; Female ; Follow-Up Studies ; Humans ; Magnetic Resonance Imaging/*methods ; Ovarian Neoplasms/*diagnosis/etiology ; Pelvis ; Precancerous Conditions/*diagnosis/etiology