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

II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury VIII.r VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.r - Tracheal/large airway necrosis, chondronecrosis, perforation

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) 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.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.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) I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury III.h III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.h - Major/massive hemoptysis IV.h IV - Airway involvement
IV.h - Large airway necrosis 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.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.k V - Pleural and/or pericardial involvement
V.k - Pleural calcifications VI.c VI - Pulmonary vasculopathies
VI.c - Pulmonary veno-occlusive disease VI.x VI - Pulmonary vasculopathies
VI.x - Pulmonary lymphangiectasis VII.d VII - Mediastinal involvement
VII.d - Fibrosing mediastinitis VIII.c VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.c - Upper airway obstruction other than angioedema or hematoma 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.j IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.j - Phrenic nerve injury - Hemi- or bilateral diaphragmatic paralysis XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.h XI - Miscellaneous
XI.h - Esophageal pathology (erosion, ulcer, tear, rupture, fistula) XI.i XI - Miscellaneous
XI.i - Esophageal toxicity XI.j XI - Miscellaneous
XI.j - Esophageal dysmotility XI.w XI - Miscellaneous
XI.w - Cavitation/necrosis of lung tumor or metastases XI.ag XI - Miscellaneous
XI.ag - Vertebral compression fracture 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 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-) XIII.e XIII - Neoplastic conditions
XIII.e - Breast cancer XV.c XV - Pathology
XV.c - Path: Organizing pneumonia (OP/BOOP) pattern (see also Id) 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.bm XV - Pathology
XV.bm - Path: Diffuse lymphangiectasis XVI.bl XVI - Imaging
XVI.bl - Imaging: An area or areas of avid tracer uptake in the lung/chest on 18F-PET scan XVII.e XVII - Infections & related conditions
XVII.e - Pneumocystis jiroveci pneumonia XVII.af XVII - Infections & related conditions
XVII.af - Reactivation of a prior pulmonary infection (TB, melioidosis) XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes

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.s I - Interstitial/parenchymal lung disease
I.s - A mass or masses I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis I.ab I - Interstitial/parenchymal lung disease
I.ab - Radiation-induced lung injury (RILI) I.ac I - Interstitial/parenchymal lung disease
I.ac - Acute radiation pneumonitis III.h III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.h - Major/massive hemoptysis IV.k IV - Airway involvement
IV.k - Bronchiectasis V.f V - Pleural and/or pericardial involvement
V.f - Pneumothorax VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum 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 IX.h IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.h - Dyspnea, unexplained otherwise XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.v XI - Miscellaneous
XI.v - Rib fracture XI.ag XI - Miscellaneous
XI.ag - Vertebral compression fracture XI.bf XI - Miscellaneous
XI.bf - Myositis of chest wall muscle(s) (localized) XVI.k XVI - Imaging
XVI.k - Imaging: An area or areas of consolidation XVI.bl XVI - Imaging
XVI.bl - Imaging: An area or areas of avid tracer uptake in the lung/chest on 18F-PET scan XVI.br XVI - Imaging
XVI.br - Imaging: Avid tracer uptake at the chest wall on PET scan