Of 205 potentially eligible patients with lung cancer requiring MV, 64 with squamous cell type, 24 with small cell type, 3 with liberation from MV after stent implantation, 15 who used MV for operation, seven with stage I-IIIa non-squamous NSCLC, seven who used MV for <24 hours or hospice care, and two taking EGFR TKIs over 10 months were excluded. The gene discussed is EGFR; the disease is lung carcinoma.