Mature Teratoma Arising in the Fallopian Tube.

Mature teratoma of the fallopian tube is extremely rare. Most cases are incidentally diagnosed as originating from the fallopian tube following cesarean section, diagnostic laparoscopy, or examination of a surgical specimen. Here, we present a case of mature teratoma of the fallopian tube identified during laparoscopic surgery. A 5-cm mature teratoma was detected in the pelvic cavity of a 30-year-old Filipino female using transvaginal ultrasonography, computed tomography, and magnetic resonance imaging (MRI). Laparoscopy revealed a cystic tumor arising from the isthmus of the right fallopian tube, macroscopically distinct from the normal right ovary. The patient underwent laparoscopic right salpingectomy. Histologic analysis confirmed a benign, mature teratoma of the fallopian tube. Gynecologic surgeons should be aware of this rare entity, as it may be encountered incidentally during surgery and influence intraoperative decision-making.