Two pigmented lesions of the female genital system. Blue nevus of the uterine endocervix and melanin pigmentation of the vagina.

Five cases of benign pigmented lesions in unusual sites are reported. They consist of four blue nevi of the uterine endocervix, respectively the 38th, 39th, 40th and 41st cases according to our review of the literature, and one melanin pigmentation of the vagina, the 12th case according to our review of the literature. The theories about the presence of melanin-containing cells (melanocytes) in unusual sites are reported and the singular finding of melanin pigmentation observed in vaginal epithelium is discussed.