Acute Kidney Injury Caused by Obstructive Nephropathy

Figure 5

Hydronephrosis grades in ultrasonogram and tomography images. Grade I, slight blunting of calyceal fornices; Grade II, blunting and enlargement of calyceal fornices but easily seen shadow of papillae; Grade III, rounding of calices with obliteration of papillae; Grade IV, extreme calyceal ballooning.

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