Abstract
A case of clear-cell carcinoma of the ovary in a 52-year-old woman having an unusual menstrual history is presented. Serum concentrations of human chorionic gonadotropin (hCG) and estradiol were 120 mlU/ml and 86 pg/ml, respectively, while the serum FSH level was 43 mlU/ml. lmmunohistochemistry of the tumor revealed positive staining for both hCG and estradiol in the tumor cells.