Figure 4. a–d.

Pelvic mass of undefined etiology on ultrasound examination in a premenopausal 41-year-old woman. Final ADNEX MR score of 5. Postsurgical histologic diagnosis was Sertoli-Leydig malignant tumor. Axial T2 -weighted spin-echo image (a) demonstrates cystic mass with solid components in the left para-uterine region. Venous supply of the mass was through the left ovarian vein (not shown). Axial contrast-enhanced study demonstrates enhancement of the solid component (green circle ROI, uterus; red circle ROI, adnexal mass). Signal intensity curve (c) shows an initial increase in the signal intensity of solid tissue that was steeper than that of myometrium (type 3 curve). Relative enhancement ratio (d) shows intense initial increase in mass enhancement compared with the uterus.