"grade 1: mildly dilated renal pelvis without calyceal dilatation"
"grade 2: further dilation of renal pelvis with dilatation of some calyces"
"grade 3: renal pelvis and calyces are dilated, however, the renal parenchymal thickness is normal"
"grade 4: all features of grade 3, together with thinning of renal parenchyma"
"Renal pelvis AP diameter of >7-10 mm is considered significant 3,4; this is not absolute and varies by institution. It can be classified according to severity of hydronephrosis 7:"
"Renal pelvis AP diameter of >7-10 mm is considered significant 3,4; this is not absolute and varies by institution. It can be classified according to severity of hydronephrosis 7:"