Considering the low expression rate of MAGE-A3 in Asian especially Southeast Asian, it would be great interests to investigate the potential polymorphism of MAGE-A3 in NSCLC patients in Taiwan. Meanwhile, it is also interesting to study the expression of PRAME and EGFR mutation status as well as to find out significant factors which may affect their expression such as smoking status, histological types, tumour size and stages in Taiwan