Term Name:	acute interstitial pneumonia
Synonyms:	accelerated interstitial pneumonia, acute interstitial pneumonitis, AIP, Hamman-Rich disease, Hamman-Rich syndrome, Idiopathic pulmonary fibrosis, acute fatal form
Definition:	A idiopathic interstitial pneumonia which develops suddenly and is severe. Initially, the lung shows edema, hyaline membranes, and interstitial acute inflammation. Later, it develops loose organizing fibrosis, mostly within alveolar septa and type II pneumocyte hyperplasia. Fever, cough, and difficulty breathing develop over 1 to 2 weeks, typically progressing to acute respiratory failure.
Ontology:	Human Disease [DOID:2800]   ( DOID:2800 )