Collision tumor: serous cystadenocarcinoma and dermoid cyst in the same ovary.
BACKGROUND
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.


METHODS
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.
Bige
Ozgur
O
Department of Obstetrics and Gynecology, Faculty of Medicine, Gynecologic Oncology Group, Dokuz Eylul University, Inciralti, Izmir, Turkey. ozgur.bige@deu.edu.tr
Demir
Ahmet
A
Koyuncuoglu
Meral
M
Secil
Mustafa
M
Ulukus
Cagnur
C
Saygili
Ugur
U
D018284:Cystadenocarcinoma, Serous / Q000473:pathology*; D003884:Dermoid Cyst / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology*