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Collision tumor: serous cystadenocarcinoma and dermoid cyst in the same ovary
Ozgur Bige1, Ahmet Demir, Meral Koyuncuoglu
1Department of Obstetrics and Gynecology, Faculty of Medicine, Gynecologic Oncology Group, Dokuz Eylul University, Inciralti, Izmir, Turkey. ozgur.bige@deu.edu.tr
Introduction:
Collision tumor means the coexistence of two adjacent, but histologically distinct tumors without histologic admixture in the same tissue or organ. Collision tumors involving ovaries are extremely rare.
Case:
We present a case of 45-year-old parous woman with a left dermoid cyst, with unusual imaging findings, massive ascites and peritoneal carcinomatosis. The patient underwent cytoreductive surgery. The histopathology revealed a collision tumor consisting of an invasive serous cystadenocarcinoma and a dermoid cyst.
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