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Classification of vesicoureteral reflux (VUR)
| VUR grade | Description |
|---|---|
| I | Reflux of urine into a nondilated ureter |
| II | Reflux of urine into a nondilated renal pelvis |
| III | Reflux of urine into a dilated ureter up to the renal pelvis with possible blunting of the calyceal fornices |
| IV | Reflux of urine into a grossly dilated ureter with moderate blunting of the calyces |
| V | Reflux of urine into a massively dilated and tortuous ureter with loss of the papillary impression |
