Tubocutaneous Fistula due to Endometriosis - A Differential Diagnosis in Cutaneous Fistulas with Cyclic Secretion.

The development of a tubocutaneous fistula due to endometriosis in a post-cesarean section surgical scar is a rare complication that generates significant morbidity in the affected women. Surgery is the treatment of choice in these cases. Hormonal therapies may lead to an improvement in symptoms, but do not eradicate such lesions. In this report, we present a 34-year-old patient with a cutaneous fistula in the left iliac fossa with cyclic secretion. Anamnesis, a physical examination, and supplementary tests led us to suggest endometriosis as the main diagnosis, which was confirmed after surgical intervention.