Abstract
Primary cutaneous endometriosis is uncommon. The authors report a case of spontaneous umbilical endometriosis in a young woman. Clinical diagnosis was based on the observation of an umbilical bluish nodule with cyclical pain and bloody discharge, simultaneous with the menstrual period. A surgical resection of the umbilical lesion was performed, together with a laparoscopic approach to exclude contemporary pelvic endometriosis. The diagnostic approach, differential diagnoses, and therapeutic options are discussed.
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