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. 2021 Jan 13;8(1):e000826. doi: 10.1136/bmjresp-2020-000826

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article 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, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Representative radiological, ultrasonographic and pathological findings in patients with the blizzard sign. (A) Chest high-resolution CT showed ground-glass opacity in the right lower lobe, and radial endobronchial ultrasonography (R-EBUS) was evaluated in the encircled area, (B) R-EBUS showed a blizzard sign with a whitish acoustic shadow of air-containing lung tissue, and (C) a lung specimen obtained by transbronchial lung cryobiopsy showed diffuse cellular and fibrous alveolitis (magnification,×3).