Paraganglioma of the Fallopian Tube Presenting as Isolated Fallopian Tube Torsion

A 32-year-old woman with no previous disease history was presented with worsening right-lower abdominal pain, which lasted for 4 days. On magnetic resonance imaging, a solid mass measuring 48 mm in longitudinal diameter connected with a tortuous structure that appeared to be a fallopian tube was identified in the right-lower abdomen. Because the right ovary was identified at a slightly distant location, isolated fallopian tube torsion with heterogeneous mass was suspected. The isolated fallopian tube torsion without ovarian involvement was laparoscopically confirmed. After detorsion, solid necrotized mass in the distal portion of the right fallopian tube near the fimbrial end became evident, followed by uneventful right salpingectomy with ovarian preservation. The pathological diagnosis was paraganglioma of the fallopian tube with positive cells for neural cell adhesion molecule, neuron-specific enolase, and S-100 protein in the viable peripheral foci of the massively necrotized hemorrhagic mass. Recurrence was not observed after 1.5 years.