Fibrothecomas and Brenner tumors have low signal intensity on T1- and T2-weighted images, representing the fibrous component.  Brenner tumors are reported to show lower signal intensity on T2-weighted images than other solid tumors

 Scattered high-signal-intensity areas in the mass represent edema or cystic degeneration. In masses with cystic degeneration, the solid component is usually located peripherally.

Differential considerations include uterine leiomyomata and other ovarian masses with fibrous components (fibroma, cystadenofibroma, Fibrothecomas and Brenner tumor).