renal_nephrometry_score: RENAL Nephrometry Score

In cliot: Clinical Indices and Outcomes Tools

RENAL Nephrometry Score

Description

Calculates the RENAL Nephrometry Score to quantify the anatomical complexity of renal masses. This system aids in surgical decision-making (e.g., partial vs. radical nephrectomy) and outcomes prediction. The acronym stands for Radius, Exophytic/Endophytic, Nearness to collecting system, Anterior/Posterior, and Location relative to polar lines.

Usage

renal_nephrometry_score(radius_cm, exophytic_percent, nearness_collecting_system_mm,
                        anterior_posterior, location_polar_lines)

Arguments

radius_cm	Numeric. Radius (maximal diameter) of the tumor in centimeters. <=4: 1 pt. >4-<7: 2 pts. >=7: 3 pts.
exophytic_percent	Numeric. Percentage of the tumor that is exophytic. >=50%: 1 pt. <50%: 2 pts. Endophytic: 3 pts.
nearness_collecting_system_mm	Numeric. Distance of the tumor to the collecting system or sinus in millimeters. >=7mm: 1 pt. >4mm-<7mm: 2 pts. <=4mm: 3 pts.
anterior_posterior	String. Location relative to the coronal plane. Options: "anterior" (a), "posterior" (p), "neither" (x).
location_polar_lines	String. Location relative to the polar lines. "entirely_above_below": Entirely above upper or below lower polar line (1 pt). "crosses_polar_line": Crosses polar line (2 pts). "gt_50_percent_across_polar_line_or_axial": >50% of mass is across polar line, or crosses axial renal midline, or entirely between polar lines (3 pts).

Value

A list containing:

RENAL_Score	The formatted score (e.g., "4a", "10p").
Complexity_Level	Classification (Low 4-6, Moderate 7-9, High 10-12).

References

Kutikov A, Uzzo RG. The R.E.N.A.L. nephrometry score: a comprehensive standardized system for quantitating renal tumor size, location and depth. J Urol. 2009;182(3):844-853. doi:10.1016/j.juro.2009.05.035

Examples

# Example 1: Low Complexity
# 3cm, 60% exophytic, 8mm from sinus, Anterior, Above polar line
# Score: 1+1+1+1 = 4a
renal_nephrometry_score(3, 60, 8, "anterior", "entirely_above_below")

# Example 2: High Complexity
# 5cm, Endophytic, Touching sinus (0mm), Posterior, Crossing midline
# Score: 2+3+3+3 = 11p
renal_nephrometry_score(5, 0, 0, "posterior", "gt_50_percent_across_polar_line_or_axial")

cliot documentation built on Dec. 1, 2025, 1:06 a.m.