Grade | Characteristics |
I | Reflux into non-dilated ureter |
II | Reflux into the renal pelvis and calyces without dilatation |
III | Mild/moderate dilatation of the ureter, renal pelvis and calyces with minimal blunting of the fornices. |
IV | Dilation of the renal pelvis and calyces with moderate ureteral tortuosity. |
V | Gross dilatation of the ureter, pelvis and calyces; ureteral tortuosity; loss of papillary impressions |