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. 2021 Sep;13(9):5556–5571. doi: 10.21037/jtd-20-3328

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2021 Journal of Thoracic Disease. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Transbronchial biopsy from a woman in 7th decade of life with AS, positive for anti-Jo-1. (A) Chest CT showed bilateral peripheral and lower lobe predominant consolidative and ground-glass opacities interpreted as mixed OP/NSIP. (B) Transbronchial biopsy showing organizing pneumonia (arrows indicate fibroblast plugs; HE, ×100). (C) Fibroblast plug (Masson body) at higher magnification. (D) Diffuse interstitial chronic inflammation (arrows; HE, ×200). These findings could be interpreted as a combination of organizing pneumonia and NSIP (HE, ×200).