In two more recent studies of Chinese patients, Han et al. [49] (Table 3) and Wei et al. [50] (Table 1) analysed, respectively, 22 and 50 primary tumours and corresponding lymph node metastases, and found EGFR mutation status concordance to be 95 % (21/22) and 94 % (47/50). Here, EGFR is linked to neoplasm.