I.s I - Interstitial/parenchymal lung disease
I.s - A mass or masses II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury IV.c IV - Airway involvement
IV.c - Obliterative bronchiolitis (a pattern consistent with) (see also IVn, XVx) IV.r IV - Airway involvement
IV.r - Airway pigmentation (black, bluish, petechial) V.x V - Pleural and/or pericardial involvement
V.x - Black pleural effusion XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.aa XV - Pathology
XV.aa - Path: Foreign body bronchiolitis (see also IVi) XXIV.k XXIV - Veterinary medicine
XXIV.k - Veterinary: Granulomatous interstitial pneumonia

XI.g XI - Miscellaneous
XI.g - Aspiration, aspiration pneumonia (w/wo demonstrable pharyngeal dysmotility) XV.aa XV - Pathology
XV.aa - Path: Foreign body bronchiolitis (see also IVi) XVI.ai XVI - Imaging
XVI.ai - Imaging: A 'tree-in-bud' pattern

IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.b IV - Airway involvement
IV.b - Bronchospasm and angioedema IV.f IV - Airway involvement
IV.f - Severe or catastrophic bronchospasm or asthma attack (can be fatal) IV.aa IV - Airway involvement
IV.aa - Occupational asthma VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) XV.aa XV - Pathology
XV.aa - Path: Foreign body bronchiolitis (see also IVi)