Isolated torsion of the fallopian tube is a rare disease entity that clinicians should consider in adolescentsand reproductive females with pelvie pain. The disease is clinically significant and should be considered in thedif-ferential diagnosis of both acute and recurrent lower abdominal pain. If not treated in time, it can causetissue gangrene and be fatal. The authors report the ultrasound and CT findings in a case of isolated fallopiantubal torsion.