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.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 II.f II - Pulmonary edema - Acute lung injury - ARDS
II.f - Hypoxemia, low oxygen saturation (may occur in isolation) 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.c IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.c - Chest wall muscle rigidity - Stiff/wooden chest IX.d IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.d - Respiratory failure from ventilatory depression (due to neuromuscular blockade/paralysis) IX.e IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.e - Disordered breathing pattern - Cheynes-Stokes respiration IX.i IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.i - Respiratory arrest - Apnea XI.r XI - Miscellaneous
XI.r - Death following exposure or poisoning XII.e XII - Cardiovascular involvement / toxicity
XII.e - Takotsubo (stress) cardiomyopathy XII.f XII - Cardiovascular involvement / toxicity
XII.f - Cardiomyopathy (acute, subacute, chronic) XII.l XII - Cardiovascular involvement / toxicity
XII.l - Cardiac arrhythmias or dysrhythmias (AF, VT, VF, TdP) XII.p XII - Cardiovascular involvement / toxicity
XII.p - QTc prolongation XII.t XII - Cardiovascular involvement / toxicity
XII.t - Torsades de pointe XII.bo XII - Cardiovascular involvement / toxicity
XII.bo - Right ventricular dysfunction.failure

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

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes XIX.b XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.b - BAL: An excess proportion of neutrophils

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.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.h I - Interstitial/parenchymal lung disease
I.h - Subclinical pulmonary infiltrates/ILD I.l I - Interstitial/parenchymal lung disease
I.l - Diffuse alveolar damage (DAD) (see alsoo under IIb and XVf) I.v I - Interstitial/parenchymal lung disease
I.v - Abnormal lung function/pulmonary physiology (PFTs) without necessarily imaging or clinical evidence I.w I - Interstitial/parenchymal lung disease
I.w - Rapidly progressive ILD/pulmonary fibrosis (Hamman-Rich syndrome) 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.c II - Pulmonary edema - Acute lung injury - ARDS
II.c - ARDS and the hemolytic-uremic syndrome (HUS) III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.c VI - Pulmonary vasculopathies
VI.c - Pulmonary veno-occlusive disease VI.f VI - Pulmonary vasculopathies
VI.f - Hemolytic and uremic syndrome (HUS). See also under Xaf VI.p VI - Pulmonary vasculopathies
VI.p - Angiomatoid pulmonary vasculopathy VIII.c VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma X.k X - Systemic/Distant conditions, syndromes and reactions
X.k - Sarcoid-like granulomatosis (endo-/extrathoracic) XV.a XV - Pathology
XV.a - Path: NSIP-cellular pattern (see also Ia, Ib) XV.i XV - Pathology
XV.i - Path: Pneumocyte atypia (reactive epithelial cells) (a.k.a. the "Napoleon Hat" sign) XV.ak XV - Pathology
XV.ak - Path: Pulmonary veno-occlusive disease (PVOD)

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging) III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) V.c V - Pleural and/or pericardial involvement
V.c - Pleural thickening VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.d VI - Pulmonary vasculopathies
VI.d - Pulmonary vasculitis or capillaritis X.r X - Systemic/Distant conditions, syndromes and reactions
X.r - Fluid retention XII.c XII - Cardiovascular involvement / toxicity
XII.c - Pericardial effusion (w/wo tamponade) XII.k XII - Cardiovascular involvement / toxicity
XII.k - Constrictive pericarditis - Pericardial thickening XII.o XII - Cardiovascular involvement / toxicity
XII.o - Coronary artery disease (subacute, chronic) XII.ay XII - Cardiovascular involvement / toxicity
XII.ay - Coronary (artery) vasculitis XV.ao XV - Pathology
XV.ao - Path: Pleuritis, pleural fibrosis

I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension

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.f I - Interstitial/parenchymal lung disease
I.f - Acute fibrinous organizing pneumonia (AFOP) I.h I - Interstitial/parenchymal lung disease
I.h - Subclinical pulmonary infiltrates/ILD I.ad I - Interstitial/parenchymal lung disease
I.ad - Radiation recall pneumonitis I.aj I - Interstitial/parenchymal lung disease
I.aj - Shrinking lung syndrome II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury II.d II - Pulmonary edema - Acute lung injury - ARDS
II.d - Pulmonary edema, cardiogenic III.g III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.g - Bleeding/hemorrhage from/around preexisting lung tumor (Localized AH) III.j III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.j - Anti-GBM-related pneumorenal syndrome and DAH (Goodpasture) or flare of III.m III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.m - Coagulopathy 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.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx) IV.y IV - Airway involvement
IV.y - Eosinophilic airway disease (asthma, bronchitis, bronchiolitis) V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) V.m V - Pleural and/or pericardial involvement
V.m - Pleuropericarditis - Pleuropericardial effusion (ANA unknown or negative) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VIII.t VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.t - Vocal cord paresis/paralysis IX.a IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.a - Diaphragm/inspiratory muscle weakness/paralysis (w/wo ARF) 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.r IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.r - Myasthenia gravis - Myasthenic-like syndrome IX.y IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.y - A flare or relapse of preexisting myasthenia gravis IX.ab IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.ab - Guillain-Barré (or GB-like) syndrome (w/wo ARF) X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction X.d X - Systemic/Distant conditions, syndromes and reactions
X.d - Lupus - Lupus syndrome (see also Vd) 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.j X - Systemic/Distant conditions, syndromes and reactions
X.j - Myopathy-Myositis-Polymyositis (see also under Xba) X.k X - Systemic/Distant conditions, syndromes and reactions
X.k - Sarcoid-like granulomatosis (endo-/extrathoracic) X.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative) X.n X - Systemic/Distant conditions, syndromes and reactions
X.n - Tumor lysis syndrome (TLS) X.s X - Systemic/Distant conditions, syndromes and reactions
X.s - Vasculitis, pulmonary (w/wo AH), extrapulmonary, systemic: ANCA-positive 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.ay X - Systemic/Distant conditions, syndromes and reactions
X.ay - Polymyalgia rheumatica XI.i XI - Miscellaneous
XI.i - Esophageal toxicity XI.av XI - Miscellaneous
XI.av - Deterioration of graft function in SOT recipients XI.ax XI - Miscellaneous
XI.ax - Esophageal stenosis/stricture 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.n XII - Cardiovascular involvement / toxicity
XII.n - Cardiovascular collapse - Cardiogenic shock - Hypotension XII.s XII - Cardiovascular involvement / toxicity
XII.s - Heart block (bundle branch- or AV-) XII.ai XII - Cardiovascular involvement / toxicity
XII.ai - Cardiotoxicity XII.ax XII - Cardiovascular involvement / toxicity
XII.ax - Necrotizing myocarditis (w/o evidence for CAD) XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id) XV.d XV - Pathology
XV.d - Path: Acute fibrinous organizing pneumonia (AFOP-pattern) (see also If) XV.g XV - Pathology
XV.g - Path: Alveolar hemorrhage (see also IIIa) XV.bb XV - Pathology
XV.bb - Path: Airway inflammation XVI.i XVI - Imaging
XVI.i - Imaging: An area or areas of involvement with a recognizable anatomic distribution XVI.v XVI - Imaging
XVI.v - Imaging: Centrilobular micronodules (can be diffuse) 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.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.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 XVII.aj XVII - Infections & related conditions
XVII.aj - Bordetella bronchiseptica pulmonary infection XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes XIX.b XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.b - BAL: An excess proportion of neutrophils XIX.c XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.c - BAL: An excess proportion of eosinophils

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

I.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) V.c V - Pleural and/or pericardial involvement
V.c - Pleural thickening V.m V - Pleural and/or pericardial involvement
V.m - Pleuropericarditis - Pleuropericardial effusion (ANA unknown or negative) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.b XII - Cardiovascular involvement / toxicity
XII.b - Valvular heart disease and/or dysfunction XII.k XII - Cardiovascular involvement / toxicity
XII.k - Constrictive pericarditis - Pericardial thickening

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.f XII - Cardiovascular involvement / toxicity
XII.f - Cardiomyopathy (acute, subacute, chronic)

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.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.b XII - Cardiovascular involvement / toxicity
XII.b - Valvular heart disease and/or dysfunction

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.f XII - Cardiovascular involvement / toxicity
XII.f - Cardiomyopathy (acute, subacute, chronic)

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) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (May commpany ILDs) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension IX.h IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.h - Dyspnea, unexplained otherwise X.n X - Systemic/Distant conditions, syndromes and reactions
X.n - Tumor lysis syndrome (TLS) X.al X - Systemic/Distant conditions, syndromes and reactions
X.al - Drug withdrawal syndrome XI.d XI - Miscellaneous
XI.d - Metabolic acidosis (incl. lactic acidosis/-gap). May cause hyperpnea/dyspnea XVII.b XVII - Infections & related conditions
XVII.b - Opportunistic pulmonary/systemic infections XVII.e XVII - Infections & related conditions
XVII.e - Pneumocystis jiroveci pneumonia XVII.g XVII - Infections & related conditions
XVII.g - Tuberculosis (pulmonary, pulmonary, extrapulmonary or disseminated). Reactivation or de novo XVII.y XVII - Infections & related conditions
XVII.y - Cryptococcus pulmonary and/or systemic infection

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) VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.w VI - Pulmonary vasculopathies
VI.w - Worsening of preexisting PHTn VI.y VI - Pulmonary vasculopathies
VI.y - Pulmonary hypertension of the newborn (Persistent PHT) XII.ai XII - Cardiovascular involvement / toxicity
XII.ai - Cardiotoxicity

VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.t VI - Pulmonary vasculopathies
VI.t - Pulmonary artery aneurysm(s)

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) IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension IX.h IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.h - Dyspnea, unexplained otherwise X.s X - Systemic/Distant conditions, syndromes and reactions
X.s - Vasculitis, pulmonary (w/wo AH), extrapulmonary, systemic: ANCA-positive XV.f XV - Pathology
XV.f - Path: Diffuse alveolar damage (DAD-pattern) (see also IL) XVII.f XVII - Infections & related conditions
XVII.f - Tuberculosis, miliary

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) I.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging) I.f I - Interstitial/parenchymal lung disease
I.f - Acute fibrinous organizing pneumonia (AFOP) I.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.n I - Interstitial/parenchymal lung disease
I.n - Pulmonary alveolar proteinosis (PAP) I.v I - Interstitial/parenchymal lung disease
I.v - Abnormal lung function/pulmonary physiology (PFTs) without necessarily imaging or clinical evidence I.x I - Interstitial/parenchymal lung disease
I.x - Pleuroparenchymal fibroelastosis (PPFE) II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) II.e II - Pulmonary edema - Acute lung injury - ARDS
II.e - Transfusion-related acute lung injury (TRALI) (May cause ARDS) II.n II - Pulmonary edema - Acute lung injury - ARDS
II.n - Engraftment syndrome III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) IV.c IV - Airway involvement
IV.c - Obliterative bronchiolitis (a pattern consistent with) (see also IVn, XVx) IV.m IV - Airway involvement
IV.m - Bronchial stenosis/stricture V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension X.c X - Systemic/Distant conditions, syndromes and reactions
X.c - Capillary leak syndrome (CLS) XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XV.a XV - Pathology
XV.a - Path: NSIP-cellular pattern (see also Ia, Ib) XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id) XV.d XV - Pathology
XV.d - Path: Acute fibrinous organizing pneumonia (AFOP-pattern) (see also If) XV.f XV - Pathology
XV.f - Path: Diffuse alveolar damage (DAD-pattern) (see also IL) XV.g XV - Pathology
XV.g - Path: Alveolar hemorrhage (see also IIIa) XV.ak XV - Pathology
XV.ak - Path: Pulmonary veno-occlusive disease (PVOD) XV.ap XV - Pathology
XV.ap - Path: Pleuroparenchymal fibrosis/fibroelastosis (PPFE) XV.bv XV - Pathology
XV.bv - Path: Pulmonary cytolytic thrombi XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules XVII.m XVII - Infections & related conditions
XVII.m - Fungal airway infection

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

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) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id) XV.e XV - Pathology
XV.e - Path: ILD with a granulomatous component (see also Im) XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes XIX.b XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.b - BAL: An excess proportion of neutrophils