[A case of giant hydronephrosis in a child, secondary to congenital stenosis of the pyeloureteral junction].

An examination of some anatomopathological and clinical aspects of hydronephrosis and its causes in childhood is followed by the description of a personal case marked by discrepancy between the anatomical and pathological picture of giant hydronephrosis and the complete absence of symptoms, resulting in delay in its clinical detection. Stress is laid on the fact that, although surgical reconstruction of the pyeloureteral junction is possible, a very great number of nephrectomies still have to be performed owing to the tardy discovery of these lesions.