R.E.N.A.L. nephrometry score (renal mass)
R.E.N.A.L. nephrometry score (Kutikov & Uzzo 2009): a 4-12 anatomic-complexity score for a renal mass facing nephron-sparing surgery, with an anterior/posterior (a/p/x) and hilar (h) suffix.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- (R) Radius / maximal diameter
- >4 to <7 cm (2)
- (E) Exophytic / endophytic
- <50% exophytic (2)
- (N) Nearness to collecting system
- >4 to <7 mm (2)
- (L) Location relative to polar lines
- Above upper or below lower polar line (1)
- (A) Anterior / posterior / indeterminate
- Posterior (p)
Result: R.E.N.A.L. 7p -- moderate complexity (4-6 low, 7-9 moderate, 10-12 high).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 4-6
- Low anatomic complexity for nephron-sparing surgery.
- 7-9
- Moderate complexity.
- 10-12
- High complexity. The a/p/x suffix records the anterior/posterior face; h marks a hilar tumor.
What you enter
- (R) Radius / maximal diameter
- (E) Exophytic / endophytic
- (N) Nearness to collecting system
- (L) Location relative to polar lines
- (A) Anterior / posterior / indeterminate
- Hilar tumor (h suffix)
How this is calculated
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. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.