The majority of tumors are pure dysgerminomas, which do not secrete any hormones. About 5%, however, contain syncytiotrophoblastic giant cells and produce β−hCG.
Dysgerminomas are multilobulated, usually unilateral, solid masses that can contain speckled calcifications (pink arrow), prominent fibrovascular septa, and central low-attenuation areas representing necrosis and hemorrhage (white arrow).
The differential diagnosis for ovarian neoplasms with calcification was covered earlier.
- Jung SE, Lee JM, Rha SE, Byun JY, Jung JI, Hahn ST. CT and MR imaging of ovarian tumors with emphasis on differential diagnosis. Radiographics. 2002 Nov-Dec;22(6):1305-25
- Shanbhogue AK, Shanbhogue DK, Prasad SR, Surabhi VR, Fasih N, Menias CO. Clinical syndromes associated with ovarian neoplasms: a comprehensive review. Radiographics. 2010 Jul-Aug;30(4):903-19.