Introduction: Menstrual fistulae are rare. They have been reported after pelvic inflammatory disease, pelvic radiation therapy, trauma, pelvic surgery, endometriosis, tuberculosis, gossypiboma, Crohn’s disease, sepsis, migration of intrauterine contraceptive device and other pelvic pathologies. We report two rare cases of menstrual fistula.
Case Series: Case 1: A 27- year-old nulliparous female presented with complaint of cyclical bleeding from the abdomen since three years. There was previous history of hypomenorrhea and cyclical abdominal pain since menarche. There is history of laparotomy five years back and laparoscopy four years back in view of pelvic mass. Soon after she began to have blood mixed discharge from scar site which coincided with her menstruation. She was diagnosed to have a vertical fusion defect with communicating left hypoplastic horn and non-communicating right horn on imaging. Laparotomy with excision of fistula and removal of right hematosalpinx was done. Case 2: 25-year-old female presented with history of lower segment caesarean section (LSCS) and burst abdomen, underwent laparotomy and loop ileostomy. Thereafter patient developed cyclical bleeding from scar site. Laparotomy with excision of fistulous tract and closure of uterine rent was done.
Conclusion: Clinical suspicion and imaging help to clinch the diagnosis. There is no recommended treatment modality. Surgery is the mainstay of management. Complete excision of fistulous tract is mandatory for good long-term outcomes.

Keywords: Abdominal menstruation, Excision of fistulous tract, Menstrual fistula, Salpingocutaneous fistula, Uterocutaneous fistula