Abnormal pulmonary interstitial morphology Bronchiolitis obliterans 2012-06-21T08:20:58Z Note that Bronchiolitis obliterans is not to be confused with the similarly named feature Bronchiolitis obliterans organizing pneumonia. Obliterative bronchiolitis Constrictive bronchiolitis SNOMEDCT_US:40100001 Inflammation and fibrosis of the bronchioles leading to partial or complete obstruction of these airways. UMLS:C2350875 HP:0011946 UMLS:C0006272