Primary Umbilical Endometriosis: A Rare Entity

Umbilicus is a rare site of endometrioma. Spontaneous or primary umbilical endometrioma are still rarer. A 41years old primipara presented with 1.5 years history of nodular umbilical swelling with cyclical pain and increase in size occurring more pronounced during menses with no prior history of any abdominal surgery or procedure or abdominal trauma. Clinical history gave a likely possibility of umbilical endometrioma. Surgical excision was done as she had not responded to prior hormonal treatment and histopathology confirmed the diagnosis.