This journal suppl. entitled: 20th Medical Research Conference; Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong KongINTRODUCTION: Lung cancer is the top cancer killer. Squamous cell carcinoma (SCC) represents the second most common histological subtype of lung cancer. Arsenic trioxide (ATO) has been demonstrated to inhibit tumour growth in lung adenocarcinoma and initiate apoptosis in acute promyelocytic leukaemia. Fibroblast growth factor (FGF) receptor (FGFR) amplification is shown in some SCC. FGFR inhibitor (eg PD173074) has been …published_or_final_versio