Table A2.
Nodal Staging Score for Selected Values of No. of Nodes Examined
| Stage | No. of Nodes Examined (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 5 | 8 | 10 | 12 | 15 | 18 | 20 | 25 | |
| T1 | 91.5 | 96.3 | 97.5 | 98.0 | 98.3 | 98.7 | 98.9 | 99.0 | 99.2 |
| T2 | 84.5 | 92.9 | 95.2 | 96.1 | 96.7 | 97.4 | 97.8 | 98.1 | 98.5 |
| T3 | 60.8 | 78.9 | 84.9 | 87.4 | 89.3 | 91.3 | 92.8 | 93.5 | 94.9 |
| T4 | 47.9 | 68.9 | 76.9 | 80.5 | 83.2 | 86.2 | 88.4 | 89.5 | 91.7 |
NOTE. Calculation of the probability of incorrect nodal staging by T stage and number of nodes examined can be used to find the probability of having nodal disease despite a pathological N0 classification. The number corresponding to patient's T stage and the number of examined nodes is the percent probability of the patient not having nodal disease.