Electronic Cigarette or Vaping-Associated Lung Injury Manifested as Acute Eosinophilic Pneumonia: A Case Report

Electronic cigarette or vaping‑associated lung injury (EVALI) is a disease defined by lung injuries caused by e‑cigarette use. It predominantly manifests in forms of organized pneumonia or diffuse al‑ veolar damage but rarely as acute eosinophilic pneumonia (AEP). This report describes a 34‑year‑old male with acute respiratory symptoms and a vaping history of only nicotine. Chest CT revealed periph‑ eral distributing multiple patchy consolidations and ground‑glass opacities dominant in both lower lobes, bilateral diffuse interlobular septal thickening, and bilateral pleural effusion without cardiomeg‑ aly. Bronchoalveolar lavage fluids showed increased eosinophilia levels, while infectious laboratory results were all negative, enabling the diagnosis of both AEP and EVALI. Herein, we report a rare case of only‑nicotine vaping EVALI manifested as AEP.