• Igor Murad Faria, Gláucia Zanetti, Miriam Menna Barreto, Rosana Souza Rodrigues, Cesar Augusto Araujo-Neto, Jorge Luiz Pereira e Silva, Dante Luiz Escuissato, Arthur Soares Souza Jr, Klaus Loureiro Irion, Alexandre Dias Mançano, Luiz Felipe Nobre, Bruno Hochhegger, and Edson Marchiori.
• Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
• J Bras Pneumol. 2015 May 1; 41 (3): 231-7.

ObjectiveTo determine the frequency of HRCT findings and their distribution in the lung parenchyma of patients with organizing pneumonia.MethodsThis was a retrospective review of the HRCT scans of 36 adult patients (26 females and 10 males) with biopsy-proven organizing pneumonia. The patients were between 19 and 82 years of age (mean age, 56.2 years). The HRCT images were evaluated by two independent observers, discordant interpretations being resolved by consensus.ResultsThe most common HRCT finding was that of ground-glass opacities, which were seen in 88.9% of the cases. The second most common finding was consolidation (in 83.3% of cases), followed by peribronchovascular opacities (in 52.8%), reticulation (in 38.9%), bronchiectasis (in 33.3%), interstitial nodules (in 27.8%), interlobular septal thickening (in 27.8%), perilobular pattern (in 22.2%), the reversed halo sign (in 16.7%), airspace nodules (in 11.1%), and the halo sign (in 8.3%). The lesions were predominantly bilateral, the middle and lower lung fields being the areas most commonly affected.ConclusionsGround-glass opacities and consolidation were the most common findings, with a predominantly random distribution, although they were more common in the middle and lower thirds of the lungs.

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