Brazilian Journal of Pulmonology

ISSN (on-line): 1806-3756 | ISSN (printed): 1806-3713

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Usual interstitial pneumonia: typical, possible, and

Pneumonia intersticial usual: padrões típico, possível e inconsistente

Pedro Paulo Teixeira e Silva Torres1, Marcelo Fouad Rabahi2, Maria Auxiliadora Carmo Moreira2, Gustavo de Souza Portes Meirelles3, Edson Marchiori4

J Bras Pneumol.2017;43(5):393-398

Abstract PDF PT PDF EN Portuguese Text

Idiopathic pulmonary fibrosis is a severe and progressive chronic fibrosing interstitial lung disease, a definitive diagnosis being established by specific combinations of clinical, radiological, and pathological findings. According to current international guidelines, HRCT plays a key role in establishing a diagnosis of usual interstitial pneumonia (UIP). Current guidelines describe three UIP patterns based on HRCT findings: a typical UIP pattern; a pattern designated "possible UIP"; and a pattern designated "inconsistent with UIP", each pattern having important diagnostic implications. A typical UIP pattern on HRCT is highly accurate for the presence of histopathological UIP, being currently considered to be diagnostic of UIP. The remaining patterns require further diagnostic investigation. Other known causes of a UIP pattern include drug-induced interstitial lung disease, chronic hypersensitivity pneumonitis, occupational diseases (e.g., asbestosis), and connective tissue diseases, all of which should be included in the clinical differential diagnosis. Given the importance of CT studies in establishing a diagnosis and the possibility of interobserver variability, the objective of this pictorial essay was to illustrate all three UIP patterns on HRCT.

 


Keywords: Tomography, X-ray computed; Lung diseases, interstitial; Pulmonary fibrosis.

 


 

 


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