I.e I - Interstitial/parenchymal lung disease
I.e - Acute eosinophilic pneumonia (AEP) I.j I - Interstitial/parenchymal lung disease
I.j - Exogenous lipoid pneumonia (subacute, acute) I.m I - Interstitial/parenchymal lung disease
I.m - ILD with a granulomatous component I.s I - Interstitial/parenchymal lung disease
I.s - A mass or masses I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury 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.f IV - Airway involvement
IV.f - Severe or catastrophic bronchospasm or asthma attack (can be fatal) IV.g IV - Airway involvement
IV.g - Cough syncope V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax V.q V - Pleural and/or pericardial involvement
V.q - Empyema V.ab V - Pleural and/or pericardial involvement
V.ab - Pneumothorax, bilateral VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.c VI - Pulmonary vasculopathies
VI.c - Pulmonary veno-occlusive disease VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) VI.i VI - Pulmonary vasculopathies
VI.i - Acute pulmonary hypertension VI.j VI - Pulmonary vasculopathies
VI.j - Mercury pulmonary embolism VI.r VI - Pulmonary vasculopathies
VI.r - Septic pulmonary embolism VI.t VI - Pulmonary vasculopathies
VI.t - Pulmonary artery aneurysm(s) VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum VII.i VII - Mediastinal involvement
VII.i - Mediastinitis VIII.c VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma VIII.d VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.d - Thermal (burns, frostbite), chemical or caustic facial and/or airway injury VIII.ai VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ai - Nasal, palatal and/or pharyngeal pathology IX.a IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.a - Diaphragm/inspiratory muscle weakness/paralysis (w/wo ARF) IX.s IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.s - Botulism (foodborne-, wound-) IX.ah IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.ah - Acute myelopathy (can cause ARF) X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative) X.u X - Systemic/Distant conditions, syndromes and reactions
X.u - Multiple organ dysfunction/failure (MODS/MOF) X.ac X - Systemic/Distant conditions, syndromes and reactions
X.ac - Anti-GBM antibody disease (Goodpasture-like or flare of preexisting GS) X.bb X - Systemic/Distant conditions, syndromes and reactions
X.bb - Foreign body (talc, cornstarch) retinopathy XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.g XI - Miscellaneous
XI.g - Aspiration, aspiration pneumonia (w/wo demonstrable pharyngeal dysmotility) XI.m XI - Miscellaneous
XI.m - Pulmonary emphysema - Lung cysts or bullae XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction XII.i XII - Cardiovascular involvement / toxicity
XII.i - Endocarditis (infective) XII.v XII - Cardiovascular involvement / toxicity
XII.v - Hypertrophic cardiomyopathy XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.s XV - Pathology
XV.s - Path: Pneumoconiosis (silicosis, talcosis, talcoma) XV.v XV - Pathology
XV.v - Path: Micronodular organizing pneumonia/BOOP XV.ag XV - Pathology
XV.ag - Path: Foreign body embolism, microangiopathy, vasculopathy XV.al XV - Pathology
XV.al - Path: Pulmonary hypertension incl. angiomatoid vasculopathy XVI.u XVI - Imaging
XVI.u - Imaging: A miliary pattern (diffuse random micronodules) XVI.v XVI - Imaging
XVI.v - Imaging: Centrilobular micronodules (can be diffuse) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.ae XVI - Imaging
XVI.ae - Imaging: A pattern similar to pneumoconiotic progressive massive fibrosis (PMF) XVI.af XVI - Imaging
XVI.af - Imaging: Lung cysts or bullae (see also XVI ah/bf) XVI.ai XVI - Imaging
XVI.ai - Imaging: A 'tree-in-bud' pattern XVII.a XVII - Infections & related conditions
XVII.a - Respiratory tract infection incl. pneumonia XVII.b XVII - Infections & related conditions
XVII.b - Opportunistic pulmonary/systemic infections XVII.g XVII - Infections & related conditions
XVII.g - Tuberculosis (pulmonary, pulmonary, extrapulmonary or disseminated). Reactivation or de novo XVII.p XVII - Infections & related conditions
XVII.p - Lung abscess/abscesses (see also VIr) XVII.s XVII - Infections & related conditions
XVII.s - Sternoclavicular septic arthritis XVII.u XVII - Infections & related conditions
XVII.u - Epidural abscess XVII.al XVII - Infections & related conditions
XVII.al - Osteomyelitis (notably of thoracic bones) XVIII.t XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.t - Eye catcher: Purpuric/Ecchymotic/Cyanotic lesions of the earlobes and/or nose XVIII.u XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.u - Eye catcher: Talc retinopathy

V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) X.q X - Systemic/Distant conditions, syndromes and reactions
X.q - Systemic inflammatory response X.s X - Systemic/Distant conditions, syndromes and reactions
X.s - Vasculitis, pulmonary (w/wo AH), extrapulmonary, systemic: ANCA-positive XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.ag XV - Pathology
XV.ag - Path: Foreign body embolism, microangiopathy, vasculopathy XV.bz XV - Pathology
XV.bz - Path: Hydrophilic polymer emboli XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.an XVI - Imaging
XVI.an - Imaging: Pleural effusion

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

IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.f IV - Airway involvement
IV.f - Severe or catastrophic bronchospasm or asthma attack (can be fatal) XI.g XI - Miscellaneous
XI.g - Aspiration, aspiration pneumonia (w/wo demonstrable pharyngeal dysmotility) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XVI.e XVI - Imaging
XVI.e - Imaging: Pulmonary opacities with a subpleural distribution

I.m I - Interstitial/parenchymal lung disease
I.m - ILD with a granulomatous component VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic) XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules

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 facial and/or airway injury 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

VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.ag XV - Pathology
XV.ag - Path: Foreign body embolism, microangiopathy, vasculopathy

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension X.bb X - Systemic/Distant conditions, syndromes and reactions
X.bb - Foreign body (talc, cornstarch) retinopathy XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XVI.u XVI - Imaging
XVI.u - Imaging: A miliary pattern (diffuse random micronodules) XVI.ai XVI - Imaging
XVI.ai - Imaging: A 'tree-in-bud' pattern XVIII.u XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.u - Eye catcher: Talc retinopathy

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 I.m I - Interstitial/parenchymal lung disease
I.m - ILD with a granulomatous component I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.f IV - Airway involvement
IV.f - Severe or catastrophic bronchospasm or asthma attack (can be fatal) IV.i IV - Airway involvement
IV.i - Foreign body aspiration bronchiolitis VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.e VI - Pulmonary vasculopathies
VI.e - Fat/oil embolism - The FES embolism syndrome VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) X.g X - Systemic/Distant conditions, syndromes and reactions
X.g - Hypersensitivity reaction (may manifest with fever and/or skin, throat or airway involvement) X.u X - Systemic/Distant conditions, syndromes and reactions
X.u - Multiple organ dysfunction/failure (MODS/MOF) X.bh X - Systemic/Distant conditions, syndromes and reactions
X.bh - Protracted, prolonged anaphylaxis XI.d XI - Miscellaneous
XI.d - Metabolic acidosis (incl. lactic acidosis/-gap). May cause hyperpnea/dyspnea XII.n XII - Cardiovascular involvement / toxicity
XII.n - Cardiovascular collapse - Cardiogenic shock - Hypotension XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.ae XV - Pathology
XV.ae - Path: Lipid/fat embolism (see also VIe) XVI.q XVI - Imaging
XVI.q - Imaging: A pattern similar/consistent to/with IPF XVI.v XVI - Imaging
XVI.v - Imaging: Centrilobular micronodules (can be diffuse)

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS) I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia) I.e I - Interstitial/parenchymal lung disease
I.e - Acute eosinophilic pneumonia (AEP) I.j I - Interstitial/parenchymal lung disease
I.j - Exogenous lipoid pneumonia (subacute, acute) I.n I - Interstitial/parenchymal lung disease
I.n - Pulmonary alveolar proteinosis (PAP) I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) I.an I - Interstitial/parenchymal lung disease
I.an - Hypersensitivity pneumonitis pattern I.ao I - Interstitial/parenchymal lung disease
I.ao - Pulmonary infiltrates II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) III.c III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.c - Hemoptysis IV.d IV - Airway involvement
IV.d - Cough (lone) V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax V.ab V - Pleural and/or pericardial involvement
V.ab - Pneumothorax, bilateral VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum VIII.w VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.w - Uvulitis, uvular edema IX.d IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.d - Respiratory failure from ventilatory depression (due to neuromuscular blockade/paralysis) X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) 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.m XI - Miscellaneous
XI.m - Pulmonary emphysema - Lung cysts or bullae XI.s XI - Miscellaneous
XI.s - Sniffing death - Death from inhalation of compound XI.av XI - Miscellaneous
XI.av - Deterioration of graft function in SOT recipients XII.c XII - Cardiovascular involvement / toxicity
XII.c - Pericardial effusion (w/wo tamponade) XII.d XII - Cardiovascular involvement / toxicity
XII.d - Myocarditis (can be fulminant) 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.s XII - Cardiovascular involvement / toxicity
XII.s - Heart block (bundle branch- or AV-) XII.w XII - Cardiovascular involvement / toxicity
XII.w - Asystole XII.af XII - Cardiovascular involvement / toxicity
XII.af - Coronary vasospasm - Vasospastic angina XII.ap XII - Cardiovascular involvement / toxicity
XII.ap - Coronary artery dissection XIII.a XIII - Neoplastic conditions
XIII.a - Lung cancer XV.k XV - Pathology
XV.k - Path: Desquamative interstitial pneumonia (DIP-pattern) XV.n XV - Pathology
XV.n - Path: Pulmonary alveolar proteinosis pattern (PAP pattern) XV.p XV - Pathology
XV.p - Path: Exogenous lipoid pneumonia XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.s XV - Pathology
XV.s - Path: Pneumoconiosis (silicosis, talcosis, talcoma) XV.v XV - Pathology
XV.v - Path: Micronodular organizing pneumonia/BOOP XVI.ai XVI - Imaging
XVI.ai - Imaging: A 'tree-in-bud' pattern XVII.a XVII - Infections & related conditions
XVII.a - Respiratory tract infection incl. pneumonia XVII.c XVII - Infections & related conditions
XVII.c - Aspergillosis, pulmonary (invasive, allergic [ABPA], or mycetoma) XVII.g XVII - Infections & related conditions
XVII.g - Tuberculosis (pulmonary, pulmonary, extrapulmonary or disseminated). Reactivation or de novo

I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia) I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) IV.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx) V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) IX.k IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.k - Trismus (lockjaw) X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative) X.bb X - Systemic/Distant conditions, syndromes and reactions
X.bb - Foreign body (talc, cornstarch) retinopathy XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.m XI - Miscellaneous
XI.m - Pulmonary emphysema - Lung cysts or bullae XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS) I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) 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 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 VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum VIII.ae VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ae - 'Meth mouth' IX.ae IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.ae - Stroke X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative) X.u X - Systemic/Distant conditions, syndromes and reactions
X.u - Multiple organ dysfunction/failure (MODS/MOF) XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning XII.f XII - Cardiovascular involvement / toxicity
XII.f - Cardiomyopathy (acute, subacute, chronic) XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction XII.ba XII - Cardiovascular involvement / toxicity
XII.ba - Sudden cardiac death XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction

I.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.j I - Interstitial/parenchymal lung disease
I.j - Exogenous lipoid pneumonia (subacute, acute) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.cl XV - Pathology
XV.cl - Path: Oil granulomas

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) I.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.j I - Interstitial/parenchymal lung disease
I.j - Exogenous lipoid pneumonia (subacute, acute) I.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules I.s I - Interstitial/parenchymal lung disease
I.s - A mass or masses I.z I - Interstitial/parenchymal lung disease
I.z - An area or areas of consolidation I.ap I - Interstitial/parenchymal lung disease
I.ap - Paraffinoma - Lipidoma (ELP in the form of a nodule or mass) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury III.c III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.c - Hemoptysis IV.w IV - Airway involvement
IV.w - Plugs/casts in the airways X.e X - Systemic/Distant conditions, syndromes and reactions
X.e - Autoimmunity-Autoimmune conditions (+ANA, +anti-ds-DNA, +ANCAs, other auto-Abs) XIII.a XIII - Neoplastic conditions
XIII.a - Lung cancer XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XV.h XV - Pathology
XV.h - Path: NSIP-fibrotic pattern XV.p XV - Pathology
XV.p - Path: Exogenous lipoid pneumonia XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XVI.a XVI - Imaging
XVI.a - Imaging: Diffuse haze XVI.f XVI - Imaging
XVI.f - Imaging: Bibasilar opacities/shadowing XVI.i XVI - Imaging
XVI.i - Imaging: An area or areas of involvement with a recognizable anatomic distribution XVI.k XVI - Imaging
XVI.k - Imaging: An area or areas of consolidation XVI.n XVI - Imaging
XVI.n - Imaging: Intralobular septal thickening - Crazy paving XVI.r XVI - Imaging
XVI.r - Imaging: An area or areas of involvement with low attenuation numbers XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules XVI.z XVI - Imaging
XVI.z - Imaging: A large nodule or a mass XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.az XVI - Imaging
XVI.az - Imaging: Solitary pulmonary nodule XVII.h XVII - Infections & related conditions
XVII.h - Nontuberculous pulmonary mycobacterial infection/superinfection XVIII.r XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.r - Eye catcher: A milky, cloudy or lumpy BAL fluid XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes XIX.h XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.h - BAL: Exogenous (oil red O-stainable) lipids in BAL macrophages XIX.j XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.j - BAL: Free exogenous lipids in supernatant XXIV.f XXIV - Veterinary medicine
XXIV.f - Veterinary: Exogenous lipoid pneumonia

I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) VI.i VI - Pulmonary vasculopathies
VI.i - Acute pulmonary hypertension VI.n VI - Pulmonary vasculopathies
VI.n - Crystal pulmonary embolism IX.d IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.d - Respiratory failure from ventilatory depression (due to neuromuscular blockade/paralysis) IX.h IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.h - Dyspnea, unexplained otherwise IX.l IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.l - Tachypnea XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction

XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction

I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging) I.t I - Interstitial/parenchymal lung disease
I.t - Pneumoconiosis (silicosis, talcosis...) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury II.f II - Pulmonary edema - Acute lung injury - ARDS
II.f - Hypoxemia, low oxygen saturation (may occur in isolation) IV.c IV - Airway involvement
IV.c - Obliterative bronchiolitis (a pattern consistent with) (see also IVn, XVx) IV.i IV - Airway involvement
IV.i - Foreign body aspiration bronchiolitis IV.m IV - Airway involvement
IV.m - Bronchial stenosis/stricture V.c V - Pleural and/or pericardial involvement
V.c - Pleural thickening V.r V - Pleural and/or pericardial involvement
V.r - Pleural mass or masses VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.g VI - Pulmonary vasculopathies
VI.g - Foreign body pulmonary vasculopathy (Excipient lung disease) VII.f VII - Mediastinal involvement
VII.f - An enlarged or dense thymus VII.n VII - Mediastinal involvement
VII.n - Mediastinal talcoma X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.u XI - Miscellaneous
XI.u - Chest pressure/discomfort XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XV.q XV - Pathology
XV.q - Path: Foreign body deposits/granulomatous reaction XV.s XV - Pathology
XV.s - Path: Pneumoconiosis (silicosis, talcosis, talcoma) XV.ag XV - Pathology
XV.ag - Path: Foreign body embolism, microangiopathy, vasculopathy XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules XVI.ae XVI - Imaging
XVI.ae - Imaging: A pattern similar to pneumoconiotic progressive massive fibrosis (PMF) XVI.bm XVI - Imaging
XVI.bm - Imaging: Avid pleural uptake on PET-scan XVIII.i XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.i - Eye-catcher: Tracer-avid pleural area or areas on PET-CT XIX.k XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.k - BAL: Talc crystals in macrophages or lying free in BALF