{"paper_id":"17ee1616-f146-420e-8540-f4987525e210","body_text":"Abstract\nPrimary umbilical endometriosis is a rare disorder and is defined as the presence of ectopic endometrial tissue within the umbilicus. The clinical diagnosis of cutaneous endometriosis remains challenging due to the variable clinical appearance and symptoms of the condition. A 50-yearold female patient with no history of previous pelvic surgery was admitted to our outpatient clinic because of a painful nodule on her umbilical region, bleeding with her menstrual cycle. After a total excision and histopathological examination of the patient’s lesion, the diagnosis of primary umbilical endometriosis was established. This case highlights the importance of including primary umbilical endometriosis in the differential diagnosis in women with a painful umbilical nodule.","source_license":"CC0","license_restricted":false}