Cytologic diagnosis of malignant melanoma metastatic to the endometrium

A case of cytologically diagnosed malignant melanoma metastatic to the endometrium is presented. The literature on extragenital malignant neoplasms metastatic to the uterus was reviewed to document the rarity of this entity. The cytologic features of metastatic malignant melanoma are described along with a differential diagnosis of other lesions having pigmented cells such as primary pigmented lesions of the endometrium, primary malignant vaginal melanomas, benign pigmented lesions of the cervix and vagina, and pigmented conditions other than melanoma.