Table 2.

Disease characteristics

Disease characteristics	Number (%)
pT4 of primary tumour	35 (23)
Affected regional lymph nodes (N)
N0 (no affected regional lymph nodes)
N1 (1 to 3 affected regional lymph nodes)	34 (22)
N2 (more than 3 affected regional lymph nodes)	61 (40) 59 (38)
Vascular invasion	22 (14)
Perineal invasion	25 (16)
Lymphangiosis	27 (17)
Grade of differentiation
G1 (well)	10 (6)
G2 (medium)	131 (85)
G3 (poorly)	13 (8)
KRAS gen
non-mutated (wild-type)	89 (58)
mutated	65 (42)
KRAS mutation
codon 12	48 (73)
codon 13	17 (27)
BRAF gen
non-mutated (wild-type)	150 (97)
mutated	4 (3)