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. 2020 Apr 28;12(4):29–47. doi: 10.4329/wjr.v12.i4.29

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Pulmonary alveolar proteinosis. A 35-year-old man who was an active smoker presented with shortness of breath and cough. A and B: Axial (A) and coronal (B) computed tomography of the chest showed smooth thickening of the interlobular and intralobular septal lines, and ground glass opacities, causing crazy paving pattern. Bronchoalveolar lavage confirmed the pulmonary alveolar proteinosis. The patient also had left-sided pneumothorax, with a chest tube in place. Courtesy of Lila Pourzand, MD.