David Boccara, Antoine De Runz, Oren Marco, Marc Chaouat and Maurice Mimoun
Extremely rare (1% of the cases), cutaneous endometriosis can be located in the umbilical region. Its principal differential diagnoses are keloid scar, sebaceous cyst and melanoma which must first be discounted. Most often in a secondary location and accompanied by concomitant menstrual pain and bleeding following abdominal surgery, Villar’s nodule can also be totally asymptomatic, isolated and without a known cause. This was the distinctive feature of our 33-year-old patient whose nodule had appeared 5 years beforehand. Only histological examination could confirm a diagnosis of endometriosis - even if the bluish multinodular aspect had strongly suggested it. Extended excision is the treatment of choice.
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