EGFR and Pleural effusion: Han et al. [29] (Table 3) analysed 37 primary tumours and corresponding metastases of the following sites obtained from Korean patients: pleural effusion (n = 12), pleura (n = 9), brain (n = 5), lymph node (n = 3), lung (n = 2), soft tissue (n = 2), adrenal gland (n = 1), pericardial effusion (n = 1), pericardium (n = 1) and ovary (n = 1); EGFR mutation status concordance was found to be 81 % (30/37).