The Neoadjuvant Rectal (NAR) score can be used to evaluate a patient with rectal cancer undergoing preoperative chemoradiation followed by surgery.
Patient selection: rectal cancer surgically resected after preoperative chemoradiation
Parameters:
(1) pN stage (0, 1 or 2)
(2) clinical T stage (from 1 to 4)
(3) pathologic T stage (from 0 to 4)
|
Parameter
|
Points
|
|
pN stage
|
5 * (N stage)
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|
clinical T stage
|
- 3 * (T stage)
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|
pathologic T stage
|
3 * (T stage)
|
subscore =
= SUM(points for all of the parameters) + 12
NAR =
= ((subscore)^2) / 9.61
Interpretation:
• minimum score: 0 (pN0, cT 4, pT 0)
• maximum score: 100 (pN 2, cT 1, pT 4)
• The higher the score the worse the prognosis.
|
NAR
|
Category
|
5-Year Overall Survival
|
|
< 8
|
low
|
92%
|
|
8 to 16
|
intermediate
|
89%
|
|
> 16
|
high
|
68%
|
