Cutaneous Endometriosis: A Differential Diagnosis of Umbilical Nodule.

Abstract

Endometriosis is a chronic disorder characterized by the presence of ectopic functional endometrial tissue outside the uterine cavityand which affects about 10% of all women of reproductive age. Cutaneous endometriosis, usually localized in the abdominal wall, is arare entity. We report the case of a nulliparous woman with an acute painful umbilical nodule that slowly increased in size during thedays prior to observation. The lesion was surrounded by a painful periumbilical subcutaneous plaque. The patient denied associatedconstitutional symptoms and reported two similar episodes in the previous two years. A skin biopsy was performed, and histopathologicexamination was consistent with the diagnosis of endometriosis. This article reviews this disease particularly rare in nulliparous andhighlights the importance of recognizing this clinical presentation of endometriosis due to its frequent association with pelvic diseasethat can lead to reduced fertility.