Figure 1From: The prognostic values of EGFR expression and KRAS mutation in patients with synchronous or metachronous metastatic colorectal cancer Immunohistochemical staining of EGFR in CRC. A. negative expression (magnification, 100X). B. 1+ (weak intensity of membrane staining) (magnification, 100X). C. 2+ (moderate intensity of membrane staining) (magnification, 100X). D. 3+ (strong intensity of membrane staining) (magnification, 100X).Back to article page