Hypersensitivity pneumonitis: patterns on high-resolution CT.
Hypersensitivity pneumonitis, also known as extrinsic allergic alveolitis, is caused by inhalation of specific environmental organic antigens. This disease may have typical high-resolution CT findings that, in the appropriate clinical setting, can be sufficiently characteristic to allow a confident diagnosis without the need for a lung biopsy. In this pictorial essay, the high-resolution CT patterns of hypersensitivity pneumonitis are illustrated. The authors emphasize the correlation among the radiologic presentation, functional abnormalities, and pathologic findings.
Patel
R A
RA
Department of Radiology, University of California at San Francisco, 94143-0628, USA. rita.patel@radiology.ucsf.edu
Sellami
D
D
Gotway
M B
MB
Golden
J A
JA
Webb
W R
WR
D000328:Adult; D000368:Aged; D000388:Air; D000542:Alveolitis, Extrinsic Allergic / Q000000981:diagnostic imaging*; D001706:Biopsy; D001980:Bronchi / Q000473:pathology; D001995:Bronchography; D003937:Diagnosis, Differential; D004781:Environmental Exposure; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008168:Lung / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement / Q000379:methods; D012129:Respiratory Function Tests; D014057:Tomography, X-Ray Computed