The incidence of gynecologic surgery during the pediatric and adolescent period remains low. In this age group, the causes of gynecologic surgery were usually divided into three parts, congenital anomalies, genital traumas, and pathologic lesions of genital tract including uterine bady and cervix, ovaries, fallopian tubes, vagina, and vulva. Among these, adnexal masses generally have been the most common cause of gynecologic surgery in the pediatric and adolescent patients.