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Table 5 High-resolution computed tomography findings in hypersensitivity pneumonitis

From: Hypersensitivity pneumonitis

Stage of disease References Sample size Findings *
Acute Cormier et al. [49] N = 20 (farmer's lung) • ground-glass opacities
• micronodules
• mosaic perfusion
• emphysema
• honeycombing
• mediastinal lymphadenopathis
Subacute Hansell et al. [50] N = 17 (including 9 with pigeon breeder's disease and 4 with farmer's lung) • generalized increase in attenuation of the lung
• nodular pattern
• reticular pattern
• patchy air space opacification
  Remy-Jardin et al. [51] N = 21 (pigeon breeder's disease) • micronodular pattern (< 5 mm in diameter)
• ground-glass attenuation
• emphysematous changes
• honeycombing
Chronic Adler et al. [52] N = 16 (antigen = ?) • fibrosis
• ground-glass attenuation
• nodules
  Remy-Jardin et al. [51] N = 24 (pigeon breeder's disease) • honeycombing
• ground-glass attenuation
• micronodules
• emphysema
  1. * The findings are ranked according to their decreasing order of prevalence in the study population.