Vapor from e cigarettes may impair the cells that line the lungs Health experts warn that flavored e cigarettes may lead to permanent lung damage. A U.S. teenager was diagnosed with "popcorn lung" after covertly vaping for three years, resulting in a lifelong, debilitating condition. Toxic metal, leached from e cigarette coil, permanently scars woman's lung Clinical and radiological characteristics of e cigarette or vaping product use associated lung injury Emergency Radiology Springer Nature Link