[Obstructive uropathies in early childhood--surgical intervention as renal protection].

: Anomalies in the urinary tract can be noticed early by prenatal sonography. In the case of obstruction, a decompressive procedure can follow immediately after birth. Long-term results of renal function in cases of pyeloureteral obstructions after 6-10 years make it clear that results are better the earlier pyelon resection is performed. In cases of obstructive megaureter, operative procedures are indicated for severe disturbances of ureteral transport. Progressive renal and ureteral wall destruction is promoted by performing operations too late.