KRAS and neoplasm: When comparing KRAS G12C-mutant cases with the rest of the KRAS-mutant cases, proximal tumours were less likely to carry the KRAS G12C mutation compared to distal tumours (OR 0.618, 95% CI 0.425–0.898, p = 0.012), whereas rectal/rectosigmoid tumours were more likely to carry the mutation as compared to the abdominal part of the colon (OR 1.425, 95% CI 1.083–1.874, p = 0.011).