Among non-metastatic CRC patients, in multivariate analysis, age at diagnosis (<75 years; p < 0.0001), site of primary tumor (right colon; p = 0.026), stage at diagnosis (stage II and III; p < 0.0001), geographical area of primary treatment (p < 0.0001) and status of the center (private hospital; p < 0.0001) were factors related to KRAS molecular testing (Table 4). Here, KRAS is linked to colorectal carcinoma.