• M-P Debray, R Borie, C Danel, A Khalil, M Majlath, and B Crestani.
• Service de radiologie, hôpital Bichat, AP-HP, 46, rue Henri-Huchard, 75018 Paris, France. Electronic address: marie-pierre.debray@aphp.fr.
• Rev Pneumol Clin. 2017 Feb 1; 73 (1): 13-26.

AbstractIdiopathic interstitial pneumonias comprise 8 clinicopathological entities, most of them with a chronic course and various prognosis. Idiopathic pulmonary fibrosis is the most frequent and most severe of these. Computed tomography has an important role for its diagnosis. It can identify the corresponding pathological pattern of usual interstitial pneumonia in about 50 percent of cases. It can suggest differential diagnosis in other cases, most frequently fibrosing nonspecific interstitial pneumonia and chronic hypersensitivity pneumonitis. Imaging features should be integrated to clinical and available pathologic data during multidisciplinary team meetings involving physicians with a good knowledge of interstitial diseases. Some cases may be unclassifiable, but these could later be reclassified as new data may occur or imaging features may change. Surgical lung biopsy is being less frequently performed and an emerging less invasive technique, lung cryobiopsy, is under evaluation. Pleuroparenchymal fibroelastosis is a distinct entity only recently described, with uncertain prevalence and prognosis that seems being quite often associated to another pattern of interstitial pneumonia.Copyright © 2016 Elsevier Masson SAS. All rights reserved.

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