Ступені міхурово-сечовідного рефлюксу*

I

Only the ureters are involved; the renal pelvis is not.

II

Reflux reaches the renal pelvis, but the calyces are not dilated.

III

The ureter and renal pelvis are dilated, with minimal or no blunting of calyces.

IV

Dilation increases, and the sharp angle of the calyceal fornices is obliterated.

V

The ureter, pelvis, and calices are grossly dilated.

Papillary impressions frequently are absent.