Lung Injury Associated with E-Cigarette or Vaping Product Use.

In the United States, an epidemic of unusual and severe lung disease associated with the use of e-cigarettes, or vaping, began in spring 2019. By fall 2019, the US Centers for Disease Control and Prevention had received reports of e-cigarette or vaping product use-associated lung injury (EVALI) cases from all state health departments in the continental US, Hawaii, and the US Virgin Islands. According to the cases, a number of young people had developed severe lung disease characterized by marked shortness of breath and cough. Constitutional and gastro-intestinal symptoms are common. Clinical laboratory test results in EVALI are often consistent with nonspecific findings of pulmonary/systemic inflammation. Many reported cases of EVALI have required critical care interventions including noninvasive positive airway pressure, cardiotonic pressors, and intubation/mechanical ventilation. The need for extracorporeal membrane oxygenation support has been reported in some cases.The lung disease is diffuse and has multiple pathologies. Patients are often treated with intravenous or oral corticosteroids with clinical improvement, although the natural history of the disease remains unknown. In rare cases, the outcome is fatal.This article reviews the epidemiology, clinical presentation, radiographic appearance, diagnostic approach, and treatment regimens for patients with vaping-induced lung disease as noted in multiple patients and the current literature.