A significant correlation was detected when the expression of EGFR was compared with the reactivity of CB-EGF1 Mab in NSCLC samples but not in SCLC (P = 0.0006, rs = 0.4319 and P = 0.3784, rs = −0.2798, respectively; Spearman test). Here, GFM1 is linked to small cell lung carcinoma.