An unusual presentation of struma ovarii mimicking a malignant process.
BACKGROUND
Struma ovarii is a rare form of ovarian neoplasm, composed entirely or predominantly of thyroid tissue. This tumor is generally benign, although malignant transformation has been reported.


METHODS
We report an unusual presentation of a postmenopausal woman with benign struma ovarii associated with a large amount of ascites, a markedly elevated CA 125 serum level, and a large complex pelvic mass thereby mimicking an ovarian cancer.


CONCLUSIONS
This case serves to remind clinicians that clinical features highly suspicious for ovarian cancer do not necessarily confirm a malignancy.
Loizzi
Vera
V
The Division of Gynecologic Oncology, The Chao Family Comprehensive Cancer Center, University of California, Irvine Medical Center, Orange, California 92868, USA.
Cappuccini
Fabio
F
Berman
Michael L
ML
D000368:Aged; D000369:Aged, 80 and over; D001201:Ascites / Q000097:blood; D018394:CA-125 Antigen / Q000097:blood; D005260:Female; D006801:Humans; D010051:Ovarian Neoplasms / Q000175:diagnosis*; D013330:Struma Ovarii / Q000175:diagnosis*
D018394:CA-125 Antigen