Demographic (age and sex), clinical (tumor location) and pathological characteristics (TNM classification, histological tumor type, tumor grade, mucin secretion, peritumoral lymphocytic infiltration, Crohn-like reaction, tumor budding, metastases in regional lymph nodes and lymphovascular and perineural invasion) of colorectal cancer in relation to MMR protein expression (proficient, deficient and heterogeneous) are shown in Table 1. Here, MRC1 is linked to neoplasm.