December&volume=2&issue=6&page=1203-1206&id=324

Endometriosis is a disorder in which abnormal growth of tissues, histologically resembling that of the endometrium, are present in locations other than the uterus. The lesions are usually found in the peritoneal surface of reproductive organs, but also can be found anywhere in the body. Primary cutaneous endometriosis is uncommon. The frequency which arises in the skin of all endometriosis is 1.1%, and those which arise in the umbilical region are about 30%. Umbilical endometriosis is a very rare surgical condition, but should be considered in the differential diagnosis of any umbilical nodule. We report a case of a 28yr old lady who presented with a bluish nodule at the umbilicus for 3 months, with no associated discharge. It was histopathologically confirmed as umbilical endometriosis.