[Clinical aspects of infantile megaureter]

84 patients with 126 megaureteres, are studied. There are some clinical differences depending on the type of megaureter and the patient's age. The number of asymptomatic cases is increasing due to ultrasonography during fetal and neonatal period. The younger the patient the more unspecific the symptomatology. Fever, anorexia, failure to gain weight and vomits are the most frequent symptoms in babies. In patients over 6 years of age a more specific symptomatology is present, such as dysuria and lumbar pain. Failure to gain weight is more frequent in cases of refluxing megaureter, especially when they are caused by obstructive uropathy, and when they are bilateral. A urological check up is recommended during fetal ultrasonography: in babies with failure to thrive; in all cases of urinary tract infection; and in micturition disorders.