Acute interstitial pneumonia
Progresses through three phases:
- An acute exudative phase characterized by temporally uniform lesions,
- An organized proliferative phase characterized by fibroblast proliferation and connective tissue formation, and finally
- A fibrotic phase characterized by collagen production, widening of alveolar septae, and organization of the alveolar exudate.
J84.114 – Acute interstitial pneumonia
236302005 – Acute interstitial pneumonia
- Acute respiratory distress syndrome (any cause)
- Exacerbation of idiopathic pulmonary fibrosis (usual interstitial pneumonia) – Usually not such acute onset.
- Exacerbation of nonspecific interstitial pneumonitis
- Severe, bilateral pneumonia
- Congestive heart failure / pulmonary edema – Usually no fever; demonstrates cardiomyopathy on echocardiogram.
- Cryptogenic organizing pneumonia
- Diffuse alveolar hemorrhage
- Acute eosinophilic pneumonia
- Hypersensitivity pneumonitis
- Pulmonary manifestations of rheumatologic diseases (including rheumatoid arthritis, dermatomyositis, polymyositis, scleroderma, and others)
- Complication from hematopoietic stem cell or solid organ transplantation
- Drug-induced pneumonitis
- Radiation pneumonitis