Table 1. Comparison of clinicopathological features between patients with HER2‐positive and HER2‐negative metastatic colorectal cancer.

^aRight‐sided carcinomas include tumors of the cecum, the ascending colon, and the transverse colon; left‐sided carcinomas include tumors of the splenic flexure, the descending colon, the colon sigmoid, and the rectum.

Abbreviations: EGFR, epidermal growth factor receptor; HER2−, HER2 negative; HER2+, HER2 positive; M0, absence of distant metastasis/metastases; M1, presence of distant metastasis/metastases.