Endometriosis presenting as a perianal abscess: case report

Abstract Endometriosis is common benign disorder characterized by the presence of endometrial glands and stroma outside the uterine cavity. Endometriosis of perianal region is a rare condition. We report a case of perianal endometriosis presenting initially as a perianal abscess. Transperineal ultrasound showed a 1.5 cm size irregular mixed echogenicity lesion without involving anal sphincters. Complete surgical excision was performed. The histopathological examination confirmed as endometriosis.