[Malignant melanoma arising from a cystic dermoid teratoma of the ovary].

The primary malignant melanoma of the ovary is a rare kind of neoplasm. This one is in the world literature the eleventh well-documented case having developed in the ovary of a 66-year-old woman. A unilateral ovarian teratoma was removed, within which a malignant melanoma was found. The junctional activity of melanocytes was demonstrated in the epidermis within the teratoma. An extraovarian primary melanoma was not observed. The patient was treated with a bilateral adnexectomy and hysterectomy.