Table 2. Primary tumor sidedness and pathological and genetic characteristics related with deficiency of mismatch repair genes (N = 201).

	Primary tumor sidedness		P-value
Variable	Right (n = 56)	Left (n = 145)
Medullary type
Yes	52	144	0.022
No	4	1
Mucinous type
Yes	47	139	0.007
No	9	6
Signet ring type
Yes	55	143	0.999
No	1	2
Tumor infiltrating lymphocytesa
Yes	13	23	0.223
No	43	122
MLH1/MSH2 status
Normal	22	69	0.013
Abnormal	10	9
Hypermutated phenotype
Hypermutated	10	7	0.008
Non-hypermutated	46	138

^a Cut-off value = 10 lymphocytes/5 high power fields.