[Blue nevus of the uterine cervix]

Seven cases of blue nevus of the endocervix were examined macroscopically and histologically. The endocervical blue nevus is a rare lesion which can be incidentally found in surgical pieces after hysterectomy in middle-aged women. It looks like a blue-blackish little lesion, located superficially in the submucosa of the endocervix. The immunohistochemical results are positive for Protein S100 of the nevus cells. Due of its localization in the cervical duct the lesion can be hardly identified through colposcopy. Histogenetical hypotheses are finally discussed.