We describe a case of torsion of the fallopian tube due to a hydosalpinx. The symptoms were acute abdominal pain. The initial diagnosis was a torsion of an ovarian tumor based on ultrasonography, computed tomography, and magnetic resonance imaging. A laparoscopic examination showed a dark-red, round, necrotic left hydosalpinx. A left laparoscopic salpingectomy was performed. The histologic examination showed a hydrosalpinx of the left tube with extensive hemorrhage and edema. We could not preserve the fallopian tube in this case. In some cases, removing occluded or pathologic fallopian tubes is useful for increasing fertility before performing IVF treatment. Further discussion about diseases of the fallopian tube is required to optimize how abnormal fallopian tubes are treated.
