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 injury on the face, mouth, tongue, pharynx or upper airway 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

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.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.h I - Interstitial/parenchymal lung disease
I.h - Subclinical pulmonary infiltrates/ILD I.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules I.l I - Interstitial/parenchymal lung disease
I.l - Diffuse alveolar damage (DAD) (see alsoo under IIb and XVf) I.s I - Interstitial/parenchymal lung disease
I.s - A mass or masses I.u I - Interstitial/parenchymal lung disease
I.u - Relapsing or migrating pneumonitis/pneumonia (see also Id) I.w I - Interstitial/parenchymal lung disease
I.w - Rapidly progressive ILD/pulmonary fibrosis (Hamman-Rich syndrome) I.z I - Interstitial/parenchymal lung disease
I.z - An area or areas of consolidation I.aa I - Interstitial/parenchymal lung disease
I.aa - Delayed ILD, -pneumonitis, -fibrosis I.ao I - Interstitial/parenchymal lung disease
I.ao - Pulmonary infiltrates I.at I - Interstitial/parenchymal lung disease
I.at - Amiodarone pulmonary toxicity - Amiodarone lung I.ax I - Interstitial/parenchymal lung disease
I.ax - Chronic pneumonitis I.ay I - Interstitial/parenchymal lung disease
I.ay - Unilateral interstitial lung disease II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury II.l II - Pulmonary edema - Acute lung injury - ARDS
II.l - Postoperative ARDS 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.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.d IV - Airway involvement
IV.d - Cough (lone) IV.r IV - Airway involvement
IV.r - Airway pigmentation (black, bluish, petechial) V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) V.c V - Pleural and/or pericardial involvement
V.c - Pleural thickening V.d V - Pleural and/or pericardial involvement
V.d - Pleural/pericardial effusion, ANA positive (DI lupus) V.t V - Pleural and/or pericardial involvement
V.t - The apical cap VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism VI.i VI - Pulmonary vasculopathies
VI.i - Acute pulmonary hypertension VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) 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.ai IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.ai - Acute respiratory failure (hypoxemia, acidosis) from myxedema (-coma) 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.q X - Systemic/Distant conditions, syndromes and reactions
X.q - Systemic inflammatory response XI.c XI - Miscellaneous
XI.c - Pleuritic chest pain XI.f XI - Miscellaneous
XI.f - Bluish, pseudocyanotic skin discoloration XI.bq XI - Miscellaneous
XI.bq - Platypnea-orthodeoxia XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XII.c XII - Cardiovascular involvement / toxicity
XII.c - Pericardial effusion (w/wo tamponade) XII.e XII - Cardiovascular involvement / toxicity
XII.e - Takotsubo (stress) cardiomyopathy XII.l XII - Cardiovascular involvement / toxicity
XII.l - Cardiac arrhythmias or dysrhythmias (AF, VT, VF, TdP) XII.n XII - Cardiovascular involvement / toxicity
XII.n - Cardiovascular collapse - Cardiogenic shock - Hypotension XII.p XII - Cardiovascular involvement / toxicity
XII.p - QTc prolongation XII.t XII - Cardiovascular involvement / toxicity
XII.t - Torsades de pointe XII.af XII - Cardiovascular involvement / toxicity
XII.af - Coronary vasospasm - Vasospastic angina XII.au XII - Cardiovascular involvement / toxicity
XII.au - Heart failure (thyrotoxicosis-, thyroid storm-mediated) XV.a XV - Pathology
XV.a - Path: NSIP-cellular pattern (see also Ia, Ib) XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic) 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.h XV - Pathology
XV.h - Path: NSIP-fibrotic pattern XV.i XV - Pathology
XV.i - Path: Pneumocyte atypia (reactive epithelial cells) (a.k.a. the "Napoleon Hat" sign) XV.j XV - Pathology
XV.j - Path: Pulmonary fibrosis (UIP-pattern) XV.k XV - Pathology
XV.k - Path: Desquamative interstitial pneumonia (DIP-pattern) XV.m XV - Pathology
XV.m - Path: Lymphoid hyperplasia (including nodular- or a lymphocytic interstitial pneumonia pattern) XV.o XV - Pathology
XV.o - Path: Endogenous lipoid pneumonia (phospholipidosis) XV.r XV - Pathology
XV.r - Path: Smudged geographic necrosis XV.ao XV - Pathology
XV.ao - Path: Pleuritis, pleural fibrosis XV.bt XV - Pathology
XV.bt - Path: Histiocytic proliferation XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing XVI.i XVI - Imaging
XVI.i - Imaging: An area or areas of involvement with a recognizable anatomic distribution XVI.j XVI - Imaging
XVI.j - Imaging: Wandering (migratory) pulmonary opacities XVI.n XVI - Imaging
XVI.n - Imaging: Intralobular septal thickening - Crazy paving XVI.s XVI - Imaging
XVI.s - Imaging: An area or areas of involvement with high attenuation numbers or metallic density XVI.w XVI - Imaging
XVI.w - Imaging: Lung nodule or nodules XVI.aa XVI - Imaging
XVI.aa - Imaging: Nodules, mass or masses with a central area of low attenuation (see also under XVIaa) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.ay XVI - Imaging
XVI.ay - Imaging: Asymmetrical, predominantly unilateral involvement XVI.az XVI - Imaging
XVI.az - Imaging: Solitary pulmonary nodule XVI.bj XVI - Imaging
XVI.bj - Imaging: Atelectasis (a combination of increased density and volume loss. Typically lobar) XVI.bq XVI - Imaging
XVI.bq - Imaging: A pattern consistent with pleuroparenchymal fibroelastosis XVI.bt XVI - Imaging
XVI.bt - Imaging: A subsolid lung nodule or nodules XVI.bx XVI - Imaging
XVI.bx - Imaging: Waxing and waning nodules XVII.e XVII - Infections & related conditions
XVII.e - Pneumocystis jiroveci pneumonia XVIII.b XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.b - Eye catcher: Electron-dense area or areas of consolidation on unenhanced chest CT XVIII.j XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.j - Eye-catcher: Avid lung uptake on 18F-PET-CT XVIII.k XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.k - Eye-catcher: An electron-dense liver on unenhanced CT XVIII.p XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.p - Eye-catcher: An electron-dense ('white') thyroid 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 XIX.e XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.e - BAL: Stainable iron in macrophages XIX.f XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.f - BAL: Foamy macrophages XIX.m XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.m - BAL: A normal cell differential XIX.p XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.p - BAL: Lamellar bodies in AM on EM

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 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 III.g III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.g - Bleeding/hemorrhage from/around preexisting lung tumor (Localized AH) III.h III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.h - Major/massive hemoptysis III.k III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.k - Epistaxis IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VIII.o VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.o - Perforation of the nasal septum VIII.r VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.r - Tracheal/large airway necrosis, chondronecrosis, perforation VIII.ab VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ab - Airway (e.g. tracheoesophageal) fistula X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) X.s X - Systemic/Distant conditions, syndromes and reactions
X.s - Vasculitis, pulmonary (w/wo AH), extrapulmonary, systemic: ANCA-positive XI.w XI - Miscellaneous
XI.w - Cavitation/necrosis of lung tumor or metastases XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XII.e XII - Cardiovascular involvement / toxicity
XII.e - Takotsubo (stress) cardiomyopathy 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.ai XII - Cardiovascular involvement / toxicity
XII.ai - Cardiotoxicity XII.aj XII - Cardiovascular involvement / toxicity
XII.aj - Systemic arterial thrombosis XII.at XII - Cardiovascular involvement / toxicity
XII.at - Aortitis 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.bf XVI - Imaging
XVI.bf - Imaging: Tumoral cavitation

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.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.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules I.l I - Interstitial/parenchymal lung disease
I.l - Diffuse alveolar damage (DAD) (see alsoo under IIb and XVf) I.p I - Interstitial/parenchymal lung disease
I.p - Fatal pneumonitis (ILD) 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.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury II.u II - Pulmonary edema - Acute lung injury - ARDS
II.u - Acute respiratory failure (e.g. from ARDS, ILD, PIE, OP, pulmonary edema or bronchospasm) requiring ECMO V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax V.p V - Pleural and/or pericardial involvement
V.p - Pleuroparenchymal fibroelastosis (PPFE) V.z V - Pleural and/or pericardial involvement
V.z - Pneumothorax (associated or secondary to drug-induced ILD) 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 VII.e VII - Mediastinal involvement
VII.e - Granulomatous mediastinal lymphadenopathy VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.c XI - Miscellaneous
XI.c - Pleuritic chest pain XV.a XV - Pathology
XV.a - Path: NSIP-cellular pattern (see also Ia, Ib) XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic) 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.h XV - Pathology
XV.h - Path: NSIP-fibrotic pattern XV.i XV - Pathology
XV.i - Path: Pneumocyte atypia (reactive epithelial cells) (a.k.a. the "Napoleon Hat" sign) XV.j XV - Pathology
XV.j - Path: Pulmonary fibrosis (UIP-pattern) XV.l XV - Pathology
XV.l - Path: Pulmonary fibrosis (not otherwise specified or unclassifiable) XV.ax XV - Pathology
XV.ax - Path: Focal organizing pneumonia XV.be XV - Pathology
XV.be - Path: Interstitial pulmonary edema XV.bf XV - Pathology
XV.bf - Path: Pulmonary necrotizing granuloma or granulomas XVI.a XVI - Imaging
XVI.a - Imaging: Diffuse haze XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing XVI.e XVI - Imaging
XVI.e - Imaging: Pulmonary opacities with a subpleural distribution XVI.k XVI - Imaging
XVI.k - Imaging: An area or areas of consolidation 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.bl XVI - Imaging
XVI.bl - Imaging: An area or areas of avid tracer uptake in the lung/chest on 18F-PET scan XVIII.j XVIII - Distinctive patterns - 'Eye-catchers'
XVIII.j - Eye-catcher: Avid lung uptake on 18F-PET-CT XIX.b XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.b - BAL: An excess proportion of neutrophils XXIV.a XXIV - Veterinary medicine
XXIV.a - Veterinary: Pneumonitis - Interstitial lung disease XXIV.b XXIV - Veterinary medicine
XXIV.b - Veterinary: Pulmonary fibrosis

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.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules I.l I - Interstitial/parenchymal lung disease
I.l - Diffuse alveolar damage (DAD) (see alsoo under IIb and XVf) 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 IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) V.d V - Pleural and/or pericardial involvement
V.d - Pleural/pericardial effusion, ANA positive (DI lupus) VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic) VII.b VII - Mediastinal involvement
VII.b - Lymphadenopathy with reactive changes 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.m X - Systemic/Distant conditions, syndromes and reactions
X.m - Vascultis (pulmonary, extrathoracic or systemic)-ANCA status unknown or negative) XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure 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.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-) XIII.b XIII - Neoplastic conditions
XIII.b - Lymphoproliferative disease (pulmonary, endobronchial, endothoracic) XV.a XV - Pathology
XV.a - Path: NSIP-cellular pattern (see also Ia, Ib) XV.b XV - Pathology
XV.b - Path: Eosinophilic pneumonia (subacute or acute) (see also Ic) 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) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp)

V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) 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.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.d I - Interstitial/parenchymal lung disease
I.d - Organizing pneumonia pattern (an area or areas of consolidation on imaging) I.j I - Interstitial/parenchymal lung disease
I.j - Exogenous lipoid pneumonia (subacute, acute) I.af I - Interstitial/parenchymal lung disease
I.af - Chemical (toxic) pneumonitis 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) III.b III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.b - Pneumorenal syndrome (w/wo ANCAs) 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.q IV - Airway involvement
IV.q - Reactive airway dysfunction syndrome (RADS) V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) VIII.c VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma VIII.h VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.h - Vocal cord dysfunction, adduction, closure, injury 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) XI.s XI - Miscellaneous
XI.s - Sniffing death - Death from inhalation of compound XII.m XII - Cardiovascular involvement / toxicity
XII.m - Cardiac- cardiorespiratory/pulmonary arrest XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia XIV.b XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.b - Sulfhemoglobinemia XV.x XV - Pathology
XV.x - Path: Acute/subacute bronchiolitis (see also IVc, IVi) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVII.p XVII - Infections & related conditions
XVII.p - Lung abscess/abscesses (see also VIr)

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.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.h I - Interstitial/parenchymal lung disease
I.h - Subclinical pulmonary infiltrates/ILD I.k I - Interstitial/parenchymal lung disease
I.k - Lung nodule or nodules I.l I - Interstitial/parenchymal lung disease
I.l - Diffuse alveolar damage (DAD) (see alsoo under IIb and XVf) I.m I - Interstitial/parenchymal lung disease
I.m - ILD with a granulomatous component 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.w I - Interstitial/parenchymal lung disease
I.w - Rapidly progressive ILD/pulmonary fibrosis (Hamman-Rich syndrome) I.x I - Interstitial/parenchymal lung disease
I.x - Pleuroparenchymal fibroelastosis (PPFE) I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis I.aa I - Interstitial/parenchymal lung disease
I.aa - Delayed ILD, -pneumonitis, -fibrosis I.ad I - Interstitial/parenchymal lung disease
I.ad - Radiation recall pneumonitis I.au I - Interstitial/parenchymal lung disease
I.au - The chemotherapy lung 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) II.d II - Pulmonary edema - Acute lung injury - ARDS
II.d - Pulmonary edema, cardiogenic 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.k IV - Airway involvement
IV.k - Bronchiectasis V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax 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.f VI - Pulmonary vasculopathies
VI.f - Hemolytic and uremic syndrome (HUS). See also under Xaf VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic) 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.t VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.t - Vocal cord paresis/paralysis IX.f IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.f - Hiccup IX.j IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.j - Phrenic nerve injury - Hemi- or bilateral diaphragmatic paralysis IX.o IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.o - Pneumorachis X.c X - Systemic/Distant conditions, syndromes and reactions
X.c - Capillary leak syndrome (CLS) 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.k X - Systemic/Distant conditions, syndromes and reactions
X.k - Sarcoid-like granulomatosis (endo-/extrathoracic) X.n X - Systemic/Distant conditions, syndromes and reactions
X.n - Tumor lysis syndrome (TLS) XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.n XI - Miscellaneous
XI.n - Neutropenia, agranulocytosis (w/wo infection/sepsis) XI.w XI - Miscellaneous
XI.w - Cavitation/necrosis of lung tumor or metastases XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XII.b XII - Cardiovascular involvement / toxicity
XII.b - Valvular heart disease and/or dysfunction XII.c XII - Cardiovascular involvement / toxicity
XII.c - Pericardial effusion (w/wo tamponade) XII.e XII - Cardiovascular involvement / toxicity
XII.e - Takotsubo (stress) cardiomyopathy 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.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.ai XII - Cardiovascular involvement / toxicity
XII.ai - Cardiotoxicity XII.bv XII - Cardiovascular involvement / toxicity
XII.bv - Atrial fibrillation XIII.a XIII - Neoplastic conditions
XIII.a - Lung cancer XIII.b XIII - Neoplastic conditions
XIII.b - Lymphoproliferative disease (pulmonary, endobronchial, endothoracic) XIII.d XIII - Neoplastic conditions
XIII.d - Malignant mesothelioma (pleural, pericardial) 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.i XV - Pathology
XV.i - Path: Pneumocyte atypia (reactive epithelial cells) (a.k.a. the "Napoleon Hat" sign) XV.l XV - Pathology
XV.l - Path: Pulmonary fibrosis (not otherwise specified or unclassifiable) XV.ak XV - Pathology
XV.ak - Path: Pulmonary veno-occlusive disease (PVOD) XV.am XV - Pathology
XV.am - Path: Thrombosis in pulmonary arterioles/venules XV.ba XV - Pathology
XV.ba - Path: Granulomatous lymphadenopathy 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.bf XVI - Imaging
XVI.bf - Imaging: Tumoral cavitation XVI.bl XVI - Imaging
XVI.bl - Imaging: An area or areas of avid tracer uptake in the lung/chest on 18F-PET scan XVI.bw XVI - Imaging
XVI.bw - Imaging: Air or an air crescent around lung tumor or metastase(s) XVII.b XVII - Infections & related conditions
XVII.b - Opportunistic pulmonary/systemic infections XVII.c XVII - Infections & related conditions
XVII.c - Aspergillosis, pulmonary (invasive, allergic [ABPA], or mycetoma) 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.j XVII - Infections & related conditions
XVII.j - Mucormycosis (pulmonary, tracheobronchial or systemic) XVII.r XVII - Infections & related conditions
XVII.r - Fungal infection (pulmonary/extrapulmonary) XVII.af XVII - Infections & related conditions
XVII.af - Reactivation of a prior pulmonary infection (TB, melioidosis) XIX.g XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.g - BAL: Atypical epithelial cells (at times poetically named

I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis III.c III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.c - Hemoptysis III.h III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.h - Major/massive hemoptysis III.l III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.l - Alveolar hemorrhage, localized (e.g. lobar) V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax 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)

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.z I - Interstitial/parenchymal lung disease
I.z - An area or areas of consolidation I.ae I - Interstitial/parenchymal lung disease
I.ae - Hydrocarbon pneumonitis I.af I - Interstitial/parenchymal lung disease
I.af - Chemical (toxic) pneumonitis I.ag I - Interstitial/parenchymal lung disease
I.ag - Fire-eater's lung/pneumonitis 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.k IV - Airway involvement
IV.k - Bronchiectasis V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) 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 XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.s XI - Miscellaneous
XI.s - Sniffing death - Death from inhalation of compound XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia XV.as XV - Pathology
XV.as - Path: Fire eater's lung XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing XVI.f XVI - Imaging
XVI.f - Imaging: Bibasilar opacities/shadowing XVI.k XVI - Imaging
XVI.k - Imaging: An area or areas of consolidation XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.ah XVI - Imaging
XVI.ah - Imaging: Pneumatoceles (see also XVIaf) 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

I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp)

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) (can accompany DI-LDs) 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.x XV - Pathology
XV.x - Path: Acute/subacute bronchiolitis (see also IVc, IVi) XV.bb XV - Pathology
XV.bb - Path: Airway inflammation XV.cv XV - Pathology
XV.cv - Path: Peribronchiolar granulomas 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.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.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.g I - Interstitial/parenchymal lung disease
I.g - Pulmonary fibrosis I.h I - Interstitial/parenchymal lung disease
I.h - Subclinical pulmonary infiltrates/ILD I.o I - Interstitial/parenchymal lung disease
I.o - Focal/localized area of pneumonitis/fibrosis 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.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.h IV - Airway involvement
IV.h - Large airway necrosis IV.k IV - Airway involvement
IV.k - Bronchiectasis IV.m IV - Airway involvement
IV.m - Bronchial stenosis/stricture V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) V.b V - Pleural and/or pericardial involvement
V.b - Eosinophilic pleural effusion V.c V - Pleural and/or pericardial involvement
V.c - Pleural thickening V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax V.h V - Pleural and/or pericardial involvement
V.h - Chylothorax V.l V - Pleural and/or pericardial involvement
V.l - Malignant pleural mesothelioma V.m V - Pleural and/or pericardial involvement
V.m - Pleuropericarditis - Pleuropericardial effusion (ANA unknown or negative) V.t V - Pleural and/or pericardial involvement
V.t - The apical cap VI.c VI - Pulmonary vasculopathies
VI.c - Pulmonary veno-occlusive disease VI.t VI - Pulmonary vasculopathies
VI.t - Pulmonary artery aneurysm(s) VI.ab VI - Pulmonary vasculopathies
VI.ab - Pulmonary artery stenosis VII.d VII - Mediastinal involvement
VII.d - Fibrosing mediastinitis VII.i VII - Mediastinal involvement
VII.i - Mediastinitis VII.j VII - Mediastinal involvement
VII.j - Compression of mediastinal structures/organs VII.l VII - Mediastinal involvement
VII.l - Calcification of mediastinal lymph nodes VIII.c VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma VIII.j VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.j - Laryngeal disorder-Laryngeal nerve palsy (dysphonia, hoarseness) VIII.r VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.r - Tracheal/large airway necrosis, chondronecrosis, perforation VIII.t VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.t - Vocal cord paresis/paralysis VIII.ab VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.ab - Airway (e.g. tracheoesophageal) fistula IX.a IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.a - Diaphragm/inspiratory muscle weakness/paralysis (w/wo ARF) IX.aj IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.aj - Paraspinal muscle myositis/myopathy/neuromyopathy +- the dropped head syndrome XI.g XI - Miscellaneous
XI.g - Aspiration, aspiration pneumonia (w/wo demonstrable pharyngeal dysmotility) XI.h XI - Miscellaneous
XI.h - Esophageal pathology (erosion, ulcer, tear, rupture, fistula) XI.i XI - Miscellaneous
XI.i - Esophageal toxicity XI.p XI - Miscellaneous
XI.p - Chest deformity: platythorax XI.v XI - Miscellaneous
XI.v - Rib fracture XI.ag XI - Miscellaneous
XI.ag - Vertebral compression fracture XI.ax XI - Miscellaneous
XI.ax - Esophageal stenosis/stricture XI.bb XI - Miscellaneous
XI.bb - Aorto-esophageal fistula XI.bs XI - Miscellaneous
XI.bs - Dropped-head syndrome XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XII.b XII - Cardiovascular involvement / toxicity
XII.b - Valvular heart disease and/or dysfunction 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.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.s XII - Cardiovascular involvement / toxicity
XII.s - Heart block (bundle branch- or AV-) XII.ad XII - Cardiovascular involvement / toxicity
XII.ad - Effusive-constrictive pericarditis XII.ak XII - Cardiovascular involvement / toxicity
XII.ak - Late left ventricular dysfunction/failure XII.an XII - Cardiovascular involvement / toxicity
XII.an - Pericardial calcification XII.bc XII - Cardiovascular involvement / toxicity
XII.bc - Coarctation of the aorta (acquired) XIII.a XIII - Neoplastic conditions
XIII.a - Lung cancer XIII.d XIII - Neoplastic conditions
XIII.d - Malignant mesothelioma (pleural, pericardial) XIII.e XIII - Neoplastic conditions
XIII.e - Breast cancer XIII.j XIII - Neoplastic conditions
XIII.j - Pulmonary synovial sarcoma XIII.l XIII - Neoplastic conditions
XIII.l - Chondrosarcoma XIII.m XIII - Neoplastic conditions
XIII.m - Tumor of the heart XV.f XV - Pathology
XV.f - Path: Diffuse alveolar damage (DAD-pattern) (see also IL) XV.l XV - Pathology
XV.l - Path: Pulmonary fibrosis (not otherwise specified or unclassifiable) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.bi XVI - Imaging
XVI.bi - Imaging: Hyperlucent lung XVI.bj XVI - Imaging
XVI.bj - Imaging: Atelectasis (a combination of increased density and volume loss. Typically lobar)

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 IV.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax X.n X - Systemic/Distant conditions, syndromes and reactions
X.n - Tumor lysis syndrome (TLS) XII.a XII - Cardiovascular involvement / toxicity
XII.a - Left or biventricular dysfunction/failure XV.f XV - Pathology
XV.f - Path: Diffuse alveolar damage (DAD-pattern) (see also IL) XVI.ab XVI - Imaging
XVI.ab - Imaging: Cavitating/cavitary lung nodule, mass or nodules (see also Iq, XIs, XIIi, XVIaa and XVIIp) XVI.bf XVI - Imaging
XVI.bf - Imaging: Tumoral cavitation XVII.g XVII - Infections & related conditions
XVII.g - Tuberculosis (pulmonary, pulmonary, extrapulmonary or disseminated). Reactivation or de novo