DO_rare_slim NCIthesaurus has symptom idiopathic interstitial pneumonia acute interstitial pneumonia NCI:C35806 GARD:12835 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. Idiopathic pulmonary fibrosis, acute fatal form disease_ontology SNOMEDCT_US_2025_09_01:129459004 ORDO:79126 ICD10CM:J84.114 ICD9CM:516.33 AIP UMLS_CUI:C0085786 DOID:2800 Hamman-Rich disease Hamman-Rich syndrome MESH:D000080203 accelerated interstitial pneumonia acute interstitial pneumonitis cough