Rare hydrosalpinx in a sexually inactive adolescent successfully treated with laparoscopy

The majority of cases of symptomatic hydrosalpinx needing treatment are caused by sexually transmitted diseases. However, here, we present a rare case of a hydrosalpinx occurring in a sexually-inactive adolescent girl successfully treated with laparoscopy. A 17-year-old girl presenting with lower abdominal symptoms had a surgical history for an inguinal hernia at infancy. Transabdominal ultrasonography revealed a multicystic lesion in the pelvis, and magnetic resonance imaging suggested hydrosalpinx. Due to the abdominal pain and a suspicion of torsion, laparoscopic surgery was performed. After aspiration and resection of a cystic tumor, we confirmed that the left ovary was normal and that the tumor involved the left fallopian tube, which was twisted at the isthmus. Although relatively rare in postmenarchal sexually inactive adolescents, clinicians and surgeons must still consider hydrosalpinx as a possible diagnosis when encountering an adolescent patient with lower abdominal pain.