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Initial chest X-ray findings in pediatric patients diagnosed with H1N1 virus infection

OBJECTIVE: To evaluate chest X-ray findings in pediatric patients diagnosed with influenza A (H1N1) virus infection. MATERIALS AND METHODS: We retrospectively reviewed chest X-ray findings in 17 cases of pulmonary infection with the H1N1 virus (in 7 males and 10 females) examined between 2012 and 20...

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Detalles Bibliográficos
Autores principales: Adôrno, Isa Félix, Tibana, Tiago Kojun, Santos, Rômulo Florêncio Tristão, Leão, Victor Machado Mendes, Brustoloni, Yvone Maia, Silva, Pedro Augusto Ignácio, Ferreira, Marco Antônio, Nunes, Thiago Franchi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Colégio Brasileiro de Radiologia e Diagnóstico por Imagem 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6472857/
https://www.ncbi.nlm.nih.gov/pubmed/31019335
http://dx.doi.org/10.1590/0100-3984.2018.0030
Descripción
Sumario:OBJECTIVE: To evaluate chest X-ray findings in pediatric patients diagnosed with influenza A (H1N1) virus infection. MATERIALS AND METHODS: We retrospectively reviewed chest X-ray findings in 17 cases of pulmonary infection with the H1N1 virus (in 7 males and 10 females) examined between 2012 and 2016. The mean age of the patients was 14 months (range, 2-89 months). The diagnosis was established on the basis of clinical and radiographic criteria, and the virus was detected by polymerase chain reaction. The radiographic findings were categorized by type/pattern of opacity and by lung zone. The patients were divided into two groups: those not requiring ventilatory support; and those requiring ventilatory support or evolving to death. RESULTS: The abnormality most often seen on chest X-rays was that of peribronchovascular opacities, the majority of which affected less than 25% of the lung, the involvement being bilateral and asymmetric. The lung zone most frequently involved was the middle third, with central and peripheral distribution, without pleural effusion. There was a statistically significant difference between the groups in terms of the symmetry of pulmonary involvement, asymmetric findings predominating in the group that required ventilatory support (p = 0.029). CONCLUSION: In pediatric patients with H1N1 virus infection, the main alterations on the initial chest X-rays are peribronchovascular opacities, nonspecific alveolar opacities, and consolidations. Although the definitive diagnosis of H1N1 virus infection cannot be made on the basis of imaging characteristics alone, using a combination of clinical and radiographic findings can substantially improve the diagnostic accuracy.