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[The umbilical pilonidal cyst: a case report. Comments on its etiopathogenesis and treatment].

A rare case of umbilical pilonidal sinus is reported. Epidemiology and symptoms of this disease are analyzed and possible mechanisms of formation are discussed. Clinical as well as pathological patterns observed seem to support the hypothesis of a congenital etiopathogenesis. Total omphalectomy is proposed as definitive treatment in order to avoid recurrences.