Table 1. Histopathological criteria for high risk malignant polyps according to Ueno et al. ² .

Low tumor differentiation grade (G3)

Haggitt’s levels (pedunculated polyps): 3 – 4

Kikuchi's levels (sessile polyps): sm3

Width of submucosal invasion: ≥ 4000 µm

Depth of submucosal invasion: ≥ 2000 µm

Positive tumor budding

Distance from the excision margin < 1 mm

Presence of vascular invasion