Table 2: Fletcher’s prognostic classification.

Risk

Size

Proliferation

index

Very low

< 2 cm

< 5/50 HPFs

Low

Between 2-5 cm

< 5/50 HPFs

Medium

< 5 cm

6-10/50 HPFs

High

5-10 cm

< 5/50 HPFs

> 10 cm

Any

Any

> 10/50 HPFs

* HPFs = High power fields.

(Own elaboration).