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Table 1 RENAL nephrometry score (adapted from Parsons et al. [26])

From: Multidetector CT imaging of complications after laparoscopic nephron-sparing surgery

 

Score

Renal lesion feature

1 point

2 points

3 points

R—Radius (maximal diameter)

≤4 cm

4–7 cm

≥7 cm

E—Exophtic vs endophytic

≥50 % Exophytic (projecting outside the renal cortex)

<50 % exophytic

Completely endophytic

N—Nearness to the collecting system/renal sinus

≥7 mm

4–7 mm

≤4 mm

A—Anterior vs posterior location)

Descriptive (no numeric score)

“a”, ventral; “p”, dorsal; “x”, others

L—Location relative to polar lines

Entirely below lower or above upper polar line

Crosses polar line

50 % of mass across polar line

Entirely between polar lines

Crosses the axial midline

Additional suffix “h” if tumour reaches hilar vessels

Renal lesion complexity

RENAL nephrometry score range

Low

4–6

Intermediate

7–9

High

10–12