- Pathological tumour size
- cm x 0.2
- LN stage
- None = 1
- 1-3 LN involved = 2
-
3 LN = 3 +
- Histological grade
- Scored 1-3
Divided into 6 prognostic groups:

- Predicts 5 and 10-year survival for EPG = 96% and for VPG = 39%
- Verified prospectively in 2 large multicentre studies