• Umbilical endometrioma is an uncommon entity and is rarely asymptomatic. A 24-year-old black woman had an asymptomatic, spontaneous umbilical endometrioma. The lesion was excised and the diagnosis was histologically confirmed.
(Arch Dermatol 112:1435-1436, 1976)
Williams HE, Barsky S, Storino W. Umbilical Endometrioma (Silent Type). Arch Dermatol. 1976;112(10):1435-1436. doi:10.1001/archderm.1976.01630340053014