[Pathology of the umbilicus: case report of a suppurative cyst of the urachus in a 12-year-old girl].

After having illustrated the varied pathology of the umbilical region, the A.A. describe a case of a suppurated cyst of the urachus (pyourachus) in a 12 years old girl. They underline the many types of onset as well as of evolution of the urachal cysts and the differential diagnosis of them. Fistolography, when possible, is the decisive examination. Obviously the treatment may be only surgical. The premonitory signs for a precocious diagnosis are indicated.