Fig. 8

Differential diagnosis: right ovarian endometrioma in an 84-year-old woman with a history of breast cancer. Axial T2-weighted image (a) shows a right ovarian mixed lesion containing simple fluid (asterisk) and solid components (arrows). Due to the hemorrhagic filling, potential enhancement of the solid portion is difficult to appreciate between unenhanced (b) and enhanced (c) fat-suppressed T1 images, whereas the subtraction sequence perfectly displays the lack of enhancement of the solid component (d). The patient underwent surgery: pathology analysis confirmed the presence of blood clots within a benign endometrioma