PIK3CA and non-small cell lung carcinoma: The comparison of EV populations in the lungs of smokers with NSCLC and control smokers and non-smokers showed that EGFR, KRAS, ALK, MET, LKB1, PIK3CA, and ROS1, proteins encoded by genes that are often associated with NSCLC, were overexpressed in lung exosome from smokers and NSCLC patients [54].