Preferred Label : acute interstitial pneumonia;
Definition : Pathology.—The term acute interstitial pneumonia is reserved for diffuse alveolar
damage of unknown cause. The acute phase is characterized by edema and hyaline membrane
formation. The later phase is characterized by airspace and/or interstitial organization
(5). The histologic pattern is indistinguishable from that of acute respiratory distress
syndrome. Radiographs and CT scans.—In the acute phase, patchy bilateral ground-glass
opacities are seen (6), often with some sparing of individual lobules, producing a
geographic appearance; dense opacification is seen in the dependent lung (Fig 1).
In the organizing phase, architectural distortion, traction bronchiectasis, cysts,
and reticular opacities are seen (7). [Fleischner Society];
RADLEX acronyms : AIP;
Source : Fleischner Society;
Origin ID : RID5330;
Automatic exact mappings (from CISMeF team)
- Currated CISMeF NLP mapping
Pathology.—The term acute interstitial pneumonia is reserved for diffuse alveolar
damage of unknown cause. The acute phase is characterized by edema and hyaline membrane
formation. The later phase is characterized by airspace and/or interstitial organization
(5). The histologic pattern is indistinguishable from that of acute respiratory distress
syndrome. Radiographs and CT scans.—In the acute phase, patchy bilateral ground-glass
opacities are seen (6), often with some sparing of individual lobules, producing a
geographic appearance; dense opacification is seen in the dependent lung (Fig 1).
In the organizing phase, architectural distortion, traction bronchiectasis, cysts,
and reticular opacities are seen (7). [Fleischner Society]
