Predominant Pattern & or Distribution
Mosaic Attenuation
Additional Findings
Small vessels in low attenuation areas, larger vessels in high attenuation areas; Air-trapping on expiratory images
The differential for small airway disease causing air tapping includes bronchiolitis obliterans syndrome, DIPNECH (diffuse idiopathic pulmonary neuroendocrine cell hyperplasia,) subacute/chronic hypersensitivity pneumonitis
DDX
Etiology
Constrictive Bronchiolitis post-lung transplant.