An arrhenoblastoma is a rare type of ovarian tumor, which primarily secretes the male sex hormone, testosterone, and rarely the female sex hormone, estrogen. It accounts for less than 0.5% of all ovarian tumors.
Arrhenoblastomas are generally benign, meaning they do not normally spread beyond the ovary. However, they may cause male physical characteristics to develop in women, such as facial hair and a deepening voice. If you suspect you have this condition, contact your doctor immediately.