What causes kidney distension?

Kidney distension, the cause may be hydronephrosis. There are many causes of hydronephrosis, the most common may be kidney stones, ureteral stones caused. It may also be because of ureteropelvic junction stenosis, ureteral stenosis, ureteral tumor, may also be caused by ectopic vascular compression outside the ureter, may also be lower urinary tract obstruction, bladder residual urine increased, secondary upper urinary tract hydrops, will also cause kidney distension. It is recommended to do B ultrasound examination, renal function examination, can find out the most preliminary reasons. If necessary, may want to do renal ureter bladder CT, venous secretion angiography, retrograde catheterization angiography, etc., can be effective diagnosis.