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Bronchiolitis: Classification, Computed Tomographic and Histopathologic Features, and Radiologic Approach

Kang, Eun-Young MD*; Woo, Ok Hee MD*; Shin, Bong Kyung MD; Yong, Hwan Seok MD*; Oh, Yu-Whan MD*; Kim, Han Kyeom MD

Journal of Computer Assisted Tomography: January-February 2009 - Volume 33 - Issue 1 - p 32-41
doi: 10.1097/RCT.0b013e3181635e50
Thoracic Imaging: Review Article

The introduction of thin-section computed tomography (CT) has improved the diagnosis of bronchiolitis and contributed to establish bronchiolitis as an important part of pulmonary medicine. The histopathologic groups of bronchiolitis include cellular bronchiolitis, diffuse panbronchiolitis, follicular bronchiolitis, respiratory bronchiolitis, proliferative bronchiolitis, constrictive bronchiolitis, and mineral dust airway disease. Bronchiolitis can be readily identified and may lead to characteristic findings on thin-section CT. Various bronchiolitis manifests as one or a combination of 3 main patterns in thin-section CT: centrilobular nodules and branching densities, ground-glass attenuation and consolidation, and low attenuation and mosaic perfusion pattern.

From the Departments of *Radiology and †Pathology, College of Medicine, Korea University, Korea University Guro Hospital, Seoul, Korea.

Received for publication September 23, 2007; accepted November 19, 2007.

Reprints: Eun-Young Kang, MD, Department of Radiology, Korea University Guro Hospital, 97 Guro-dong, Guro-gu, Seoul 152-703, Korea (e-mail:

© 2009 Lippincott Williams & Wilkins, Inc.