Umbilical cutaneous endometriosis: a diagnostic challenge

Umbilical cutaneous endometriosis is a rare cause of umbilical nodules and may closely mimic benign or malignant tumours. A patient was initially referred on the urgent skin cancer pathway with a rapidly growing umbilical lesion, which had been present for 3 months. The lesion was later confirmed histologically as endometriosis. Awareness of this diagnosis facilitates earlier recognition and avoids unnecessary investigations.