Abstract
Hydrosalpinx is a predisposing factor of isolated tubal torsion. However, the incidence of hydrosalpinx with tubal torsion in pre-menarcheal girls is very rare, and the pre-operative diagnosis is difficult to establish. We report a case of a pre-menarcheal 11-year-old girl. Hydrosalpinx was diagnosed pre-operatively by MRI, and because of repeated left lower abdominal pain, we diagnosed a tubal torsion. Emergent laparoscopy was performed, and torsion of the left hydrosalpinx was confirmed and resected. It is our recommendation that in the differential diagnosis of repeat acute lower abdominal pain in girls, isolated torsion of the fallopian tubes should be considered.