Can urinary stones cause hydronephrosis?

Urinary stones can cause hydronephrosis. If kidney stones completely block the ureter, causing ureteral obstruction, there may be obvious hydronephrosis. Or kidney stones in the renal pelvis, ureter junction, causing urine can not be discharged, there will be obvious hydronephrosis. Urinary stones can cause hydronephrosis. For example, kidney stones fall into the ureter, if the kidney stones are relatively small, there is a gap between the kidney stones and the ureter, urine can flow out from the gap, in this case may not show hydronephrosis. If the stones are relatively large, the stones completely block the ureter, causing ureter obstruction, then it will show obvious hydronephrosis. For example, kidney stones in the kidney, such as the lower pole of the kidney, do not affect urine discharge, do not show hydronephrosis. If the kidney stone falls into the renal pelvis, ureter junction, and in this place, urine can not be smoothly discharged, it will show hydronephrosis.