Langerhans cell histiocytosis limited to the female genital tract: A review of literature with three additional cases

•LCH of the female reproductive tract has four patterns of involvement.•A comprehensive literature review revealed 35 cases of pure genital LCH.•We report two new cases of pure LCH lesions of the vulva and one of the cervix.•Treatment of LCH varies and there is no standard for pure genital involvement.•Prognosis of LCH confined to the gynecologic tract appears to be favorable.