[Hydronephrosis arterial hypertension. Report of 4 cases].

Four cases of ureteropelvic junction syndrome associated with arterial hypertension were reported. The authors discuss the ethiopathogenic of hypertension, on the basis of these observations and a review of the literature. They conclude that union bilateral hydronephrosis can lead to hypertension and renal failure by both inappropriate production of renin and water chronic retention. The correction of ureteropelvic junction should return blood pressure to normal levels.