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Influenza A (H1N1) pneumonia: HRCT findings

OBJECTIVE: To describe aspects found on HRCT scans of the chest in patients infected with the influenza A (H1N1) virus. METHODS: We retrospectively analyzed the HRCT scans of 71 patients (38 females and 33 males) with H1N1 infection, confirmed through laboratory tests, between July and September of...

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Autores principales: Amorim, Viviane Brandão, Rodrigues, Rosana Souza, Barreto, Miriam Menna, Zanetti, Gláucia, Hochhegger, Bruno, Marchiori, Edson
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Sociedade Brasileira de Pneumologia e Tisiologia 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4075839/
https://www.ncbi.nlm.nih.gov/pubmed/23857688
http://dx.doi.org/10.1590/S1806-37132013000300009
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author Amorim, Viviane Brandão
Rodrigues, Rosana Souza
Barreto, Miriam Menna
Zanetti, Gláucia
Hochhegger, Bruno
Marchiori, Edson
author_facet Amorim, Viviane Brandão
Rodrigues, Rosana Souza
Barreto, Miriam Menna
Zanetti, Gláucia
Hochhegger, Bruno
Marchiori, Edson
author_sort Amorim, Viviane Brandão
collection PubMed
description OBJECTIVE: To describe aspects found on HRCT scans of the chest in patients infected with the influenza A (H1N1) virus. METHODS: We retrospectively analyzed the HRCT scans of 71 patients (38 females and 33 males) with H1N1 infection, confirmed through laboratory tests, between July and September of 2009. The HRCT scans were interpreted by two thoracic radiologists independently, and in case of disagreement, the decisions were made by consensus. RESULTS: The most common HRCT findings were ground-glass opacities (85%), consolidation (64%), or a combination of ground-glass opacities and consolidation (58%). Other findings were airspace nodules (25%), bronchial wall thickening (25%), interlobular septal thickening (21%), crazy-paving pattern (15%), perilobular pattern (3%), and air trapping (3%). The findings were frequently bilateral (89%), with a random distribution (68%). Pleural effusion, when observed, was typically minimal. No lymphadenopathy was identified. CONCLUSIONS: The most common findings were ground-glass opacities and consolidations, or a combination of both. Involvement was commonly bilateral with no axial or craniocaudal predominance in the distribution. Although the major tomographic findings in H1N1 infection are nonspecific, it is important to recognize such findings in order to include infection with the H1N1 virus in the differential diagnosis of respiratory symptoms.
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spelling pubmed-40758392014-07-16 Influenza A (H1N1) pneumonia: HRCT findings Amorim, Viviane Brandão Rodrigues, Rosana Souza Barreto, Miriam Menna Zanetti, Gláucia Hochhegger, Bruno Marchiori, Edson J Bras Pneumol Original Articles OBJECTIVE: To describe aspects found on HRCT scans of the chest in patients infected with the influenza A (H1N1) virus. METHODS: We retrospectively analyzed the HRCT scans of 71 patients (38 females and 33 males) with H1N1 infection, confirmed through laboratory tests, between July and September of 2009. The HRCT scans were interpreted by two thoracic radiologists independently, and in case of disagreement, the decisions were made by consensus. RESULTS: The most common HRCT findings were ground-glass opacities (85%), consolidation (64%), or a combination of ground-glass opacities and consolidation (58%). Other findings were airspace nodules (25%), bronchial wall thickening (25%), interlobular septal thickening (21%), crazy-paving pattern (15%), perilobular pattern (3%), and air trapping (3%). The findings were frequently bilateral (89%), with a random distribution (68%). Pleural effusion, when observed, was typically minimal. No lymphadenopathy was identified. CONCLUSIONS: The most common findings were ground-glass opacities and consolidations, or a combination of both. Involvement was commonly bilateral with no axial or craniocaudal predominance in the distribution. Although the major tomographic findings in H1N1 infection are nonspecific, it is important to recognize such findings in order to include infection with the H1N1 virus in the differential diagnosis of respiratory symptoms. Sociedade Brasileira de Pneumologia e Tisiologia 2013 /pmc/articles/PMC4075839/ /pubmed/23857688 http://dx.doi.org/10.1590/S1806-37132013000300009 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Articles
Amorim, Viviane Brandão
Rodrigues, Rosana Souza
Barreto, Miriam Menna
Zanetti, Gláucia
Hochhegger, Bruno
Marchiori, Edson
Influenza A (H1N1) pneumonia: HRCT findings
title Influenza A (H1N1) pneumonia: HRCT findings
title_full Influenza A (H1N1) pneumonia: HRCT findings
title_fullStr Influenza A (H1N1) pneumonia: HRCT findings
title_full_unstemmed Influenza A (H1N1) pneumonia: HRCT findings
title_short Influenza A (H1N1) pneumonia: HRCT findings
title_sort influenza a (h1n1) pneumonia: hrct findings
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4075839/
https://www.ncbi.nlm.nih.gov/pubmed/23857688
http://dx.doi.org/10.1590/S1806-37132013000300009
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