Among patients qualified for nephron-sparing surgery due to CT examination results infiltration of the calyx and renal pelvis was not detected in the majority of cases ( p = 0.00), opposite to radical procedures, where infiltration of the calyces is much more common ( p = 0.02) as well as renal pelvis infiltration ( p = 0.05) (although in the case of renal pelvis infiltration it was of borderline significance) ( Fig. 6 ).
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