Paratubal Cyst With Isolated Torsion of the Fallopian Tube

Isolated fallopian tube torsion (IFTT) is a rare condition in which the fallopian tube torses without any ovarian involvement. This condition most often occurs in perimenarchal girls and usually presents with pain on the side of torsion. A patient in her teens presented with worsening pain. Sonographic evaluation revealed a midline cystic structure displacing the uterus. The cyst was originally thought to be ovarian, but there was no sonographic evidence to support attachment to an ovary. Because of the differential diagnosis and possibility of fallopian tube torsion, the patient was sent to surgery. Surgery confirmed the differential diagnosis of a paratubal cyst with right-sided isolated fallopian tube torsion.