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  Indian J Med Microbiol
 

Figure 1: B-mode ultrasonographic (longitudinal views) appearances of hydronephrosis. (a) Grade 0: normal kidney, no obstruction. (b) Grade 1: mild hydronephrosis. (c) Grade 2: moderate hydronephrosis. (d) Grade 3: severe hydronephrosis. Grade 4: same as Grade 3, but the renal parenchyma over the calyces is thinned

Figure 1: B-mode ultrasonographic (longitudinal views) appearances of hydronephrosis. (a) Grade 0: normal kidney, no obstruction. (b) Grade 1: mild hydronephrosis. (c) Grade 2: moderate hydronephrosis. (d) Grade 3: severe hydronephrosis. Grade 4: same as Grade 3, but the renal parenchyma over the calyces is thinned