Seemingly healthy cells may in fact hide clues that lung cancer would later develop an alarming study shows. The researchers examined gene expression in patients with non-small cell lung cancer (NSCLC). It showed the area adjacent to tumours is rich with cancer markers. In addition researchers from University of Texas' MD Anderson Cancer Centre discovered the previously unknown role of a cancer-promoting gene in the airways of smokers with lung cancer. 'These cancer-associated changes that distinguish the airways of smokers with lung cancer and healthy smokers may help us diagnose lung cancer earlier and develop more effective strategies for treatment'