Isolated Fallopian Tube Torsion Caused by a Mature Cystic Teratoma: A Rare Case Report

 Introduction Isolated torsion of the fallopian tube is a rare but significant cause of acute pelvic pain in women of reproductive age. We present a rare case of tubal torsion caused by a mature para-tubal cystic teratoma arising from the right fallopian tube.  Case Presentation A 27-year-old woman presented to the gynecological emergency department with acute right iliac fossa pain of five days’ duration, associated with vomiting. Imaging revealed an adnexal mass suggestive of a teratoma and a twisted fallopian tube. Surgical exploration confirmed an isolated right tubal torsion with a mature cystic teratoma arising from the infundibulum. Due to tubal necrosis, a retrograde right salpingectomy with cystectomy was performed. Histopathology confirmed a mature cystic teratoma.  Conclusion Although dermoid cysts typically arise from the ovary, rare para-tubal or tubal localizations can cause isolated tubal torsion. Early diagnosis and surgical intervention are essential to prevent complications and preserve fertility when possible.