Ovarian dysgerminoma : MR and CT appearance

We determined the MR and CT appearance of ovarian dysgerminoma and correlated our findings with the pathologic features. CT and MR findings of three patients with ovarian dysgerminoma were retrospectively reviewed and compared with the pathologic findings. The tumors were divided into lobules by septa that were hypointense or isointense on T2-weighted imaging and showed marked enhancement on Gd-diethylene triamine pentaacetic acid enhanced T1-weighted imaging and contrast-enhanced CT. These septa corresponded to fibrovascular bundles at histologic examination. CT and MR findings characteristic of fibrovascular septa within solid ovarian masses should raise the possibility of dysgerminomas.