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

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS) I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia) I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging) I.e I - Interstitial/parenchymal lung disease
I.e - Acute eosinophilic pneumonia (AEP) I.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury II.j II - Pulmonary edema - Acute lung injury - ARDS
II.j - Transient pulmonary opacities/infiltrates (see also under Iav) III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.c IV - Airway involvement
IV.c - Obliterative bronchiolitis (a pattern consistent with) (see also IVn, XVx) IV.e IV - Airway involvement
IV.e - Cough (acute, violent, explosive) IV.f IV - Airway involvement
IV.f - Severe or catastrophic bronchospasm or asthma attack (can be fatal) V.b V - Pleural and/or pericardial involvement
V.b - Eosinophilic pleural effusion V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax V.x V - Pleural and/or pericardial involvement
V.x - Black pleural effusion VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) VIII.d VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.d - Thermal (burns, frostbite), chemical or caustic injury on the face, mouth, tongue, pharynx or upper airway VIII.m VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.m - Drug foreign body in the airway VIII.ac VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ac - Retropharyngeal emphysema VIII.ap VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ap - Airway foreign body X.ac X - Systemic/Distant conditions, syndromes and reactions
X.ac - Anti-GBM antibody disease (Goodpasture-like or flare of preexisting GS) XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.c XI - Miscellaneous
XI.c - Pleuritic chest pain XI.bp XI - Miscellaneous
XI.bp - Lung herniation XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction XII.l XII - Cardiovascular involvement / toxicity
XII.l - Cardiac arrhythmias or dysrhythmias (AF, VT, VF, TdP) XII.aa XII - Cardiovascular involvement / toxicity
XII.aa - Arterial (aorta, limb) vasoconstriction and/or ischemia, acute XII.ae XII - Cardiovascular involvement / toxicity
XII.ae - Aortic dissection XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic) XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XV.g XV - Pathology
XV.g - Path: Alveolar hemorrhage (see also IIIa) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.s XV - Pathology
XV.s - Path: Pneumoconiosis (silicosis, talcosis, talcoma) XV.bb XV - Pathology
XV.bb - Path: Airway inflammation XV.bj XV - Pathology
XV.bj - Path: Alveolar carbonaceous material or deposits XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing XVI.d XVI - Imaging
XVI.d - Imaging: Alveolar opacities or haze with a batwing or butterfly distribution XVI.k XVI - Imaging
XVI.k - Imaging: An area or areas of consolidation XVIII.l XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.l - Eye catcher: Candy-cane esophagus