I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis 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.e III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.e - Pulmonary hematoma III.k III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.k - Epistaxis IV.af IV - Airway involvement
IV.af - Calcification of tracheobronchial cartilaginous rings V.e V - Pleural and/or pericardial involvement
V.e - Hemothorax - Serosanguineous pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion VII.g VII - Mediastinal involvement
VII.g - Hemomediastinum - Mediastinal hematoma VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO VIII.q VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.q - Tongue involvement (edema, glossitis, hematoma) VIII.u VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.u - Vocal cord hematoma VIII.v VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.v - Retropharyngeal hematoma (may cause UAO) IX.x IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.x - Thoracic epidural or spinal hematoma X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction XI.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) XI.am XI - Miscellaneous
XI.am - Rectus abdominis hematoma XII.ar XII - Cardiovascular involvement / toxicity
XII.ar - Calcification of the coronary artery walls or atheroma XIX.d XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.d - BAL: Gross or microscopic bleeding/hemorrhage XIX.e XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.e - BAL: Stainable iron in macrophages XXIV.e XXIV - Veterinary medicine
XXIV.e - Veterinary: Tracheal hemorrhage, stenosis, collapse

I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis I.ao I - Interstitial/parenchymal lung disease
I.ao - Pulmonary infiltrates II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury III.a III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.a - Alveolar hemorrhage (AH), diffuse AH (DAH) III.c III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.c - Hemoptysis 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) IV.z IV - Airway involvement
IV.z - Bronchial wall erosion/hematoma IV.ah IV - Airway involvement
IV.ah - Bronchopericardial fistula V.a V - Pleural and/or pericardial involvement
V.a - Pleural effusion (uni- or bilateral) (can accompany DI-LDs) V.e V - Pleural and/or pericardial involvement
V.e - Hemothorax - Serosanguineous pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion V.af V - Pleural and/or pericardial involvement
V.af - Pneumopericardium VI.b VI - Pulmonary vasculopathies
VI.b - Pulmonary arterial hypertension VI.o VI - Pulmonary vasculopathies
VI.o - Air/gas embolism VI.z VI - Pulmonary vasculopathies
VI.z - Pulmonary vein stenosis VI.ac VI - Pulmonary vasculopathies
VI.ac - Pulmonary infarction VI.ae VI - Pulmonary vasculopathies
VI.ae - Pulmonary vein perforation/rupture VII.d VII - Mediastinal involvement
VII.d - Fibrosing mediastinitis VII.g VII - Mediastinal involvement
VII.g - Hemomediastinum - Mediastinal hematoma VII.h VII - Mediastinal involvement
VII.h - Pneumomediastinum VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO VIII.h VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.h - Vocal cord dysfunction, adduction, closure, injury VIII.j VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.j - Laryngeal disorder-Laryngeal nerve palsy (dysphonia, hoarseness) IX.j IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.j - Phrenic nerve injury - Hemi- or bilateral diaphragmatic paralysis IX.n IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.n - Vagal nerve injury (may cause GE reflux/GERD) 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.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) XI.bl XI - Miscellaneous
XI.bl - Pericardial-esophageal fistula XII.c XII - Cardiovascular involvement / toxicity
XII.c - Pericardial effusion (w/wo tamponade) XII.g XII - Cardiovascular involvement / toxicity
XII.g - Coronary artery disease (acute) - Myocardial ischemia/infarction XII.af XII - Cardiovascular involvement / toxicity
XII.af - Coronary vasospasm - Vasospastic angina XII.aw XII - Cardiovascular involvement / toxicity
XII.aw - Postcardiac/-cardiotomy injury (PCIS-Dressler syndrome) XII.bd XII - Cardiovascular involvement / toxicity
XII.bd - Perforation of the heart - Cardiac rupture XII.bg XII - Cardiovascular involvement / toxicity
XII.bg - Atrio-esophageal fistula XII.bh XII - Cardiovascular involvement / toxicity
XII.bh - Atrial septal defect, acquired XII.bk XII - Cardiovascular involvement / toxicity
XII.bk - Pulmonary vein thrombosis XV.g XV - Pathology
XV.g - Path: Alveolar hemorrhage (see also IIIa) XV.ah XV - Pathology
XV.ah - Path: Pulmonary congestion XV.ak XV - Pathology
XV.ak - Path: Pulmonary veno-occlusive disease (PVOD) XV.cx XV - Pathology
XV.cx - Path: Pulmonary vein stenosis XVI.b XVI - Imaging
XVI.b - Imaging: Ground-glass opacities (GGO) / shadowing XVI.l XVI - Imaging
XVI.l - Imaging: Peribronchovascular areas of consolidation XVI.bg XVI - Imaging
XVI.bg - Imaging: Pulmonary vein stenosis XVI.bo XVI - Imaging
XVI.bo - Imaging: Localized calcification of pulmonary vein or veins XVII.a XVII - Infections & related conditions
XVII.a - Respiratory tract infection incl. pneumonia

I.a I - Interstitial/parenchymal lung disease
I.a - Pneumonitis (ILD), acute and/or severe (may cause ARDS) I.b I - Interstitial/parenchymal lung disease
I.b - Pneumonitis (ILD) I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia) 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.c III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.c - Hemoptysis V.e V - Pleural and/or pericardial involvement
V.e - Hemothorax - Serosanguineous pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion VI.f VI - Pulmonary vasculopathies
VI.f - Hemolytic and uremic syndrome (HUS). See also under Xaf VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO VIII.k VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.k - Submucosal airway petechiae/hemorrhage X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction 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.q X - Systemic/Distant conditions, syndromes and reactions
X.q - Systemic inflammatory response XI.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) 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) XIX.c XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.c - BAL: An excess proportion of eosinophils

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) V.e V - Pleural and/or pericardial involvement
V.e - Hemothorax - Serosanguineous pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion VI.a VI - Pulmonary vasculopathies
VI.a - Pulmonary embolism - Venous thrombosis/thromboembolism VII.g VII - Mediastinal involvement
VII.g - Hemomediastinum - Mediastinal hematoma VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) XI.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) XII.u XII - Cardiovascular involvement / toxicity
XII.u - Left-sided intracavitary thrombosis

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.e III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.e - Pulmonary hematoma V.e V - Pleural and/or pericardial involvement
V.e - Hemothorax - Serosanguineous pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion VII.g VII - Mediastinal involvement
VII.g - Hemomediastinum - Mediastinal hematoma VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO XI.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) XII.k XII - Cardiovascular involvement / toxicity
XII.k - Constrictive pericarditis - Pericardial thickening

I.i I - Interstitial/parenchymal lung disease
I.i - Diffuse pulmonary calcification (calciphylaxis) I.y I - Interstitial/parenchymal lung disease
I.y - Progression, acceleration or exacerbation of preexisting ILD/fibrosis 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.e III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.e - Pulmonary hematoma III.l III - Pulmonary/alveolar./airway hemorrhage/bleeding
III.l - Alveolar hemorrhage, localized (e.g. lobar) IV.af IV - Airway involvement
IV.af - Calcification of tracheobronchial cartilaginous rings V.b V - Pleural and/or pericardial involvement
V.b - Eosinophilic pleural effusion V.n V - Pleural and/or pericardial involvement
V.n - Hemopericardium - Bloody pericardial effusion VII.g VII - Mediastinal involvement
VII.g - Hemomediastinum - Mediastinal hematoma VIII.b VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.b - Hematoma of/around central airway wall potentially causing UAO VIII.q VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.q - Tongue involvement (edema, glossitis, hematoma) IX.x IX - Neuromuscular / CNS involvement - Disordered breathing during sleep
IX.x - Thoracic epidural or spinal hematoma XI.k XI - Miscellaneous
XI.k - Esophageal hematoma (may cause chest pain and/or tracheal compression) XI.aj XI - Miscellaneous
XI.aj - Congenital respiratory malformations in the fetus XI.ar XI - Miscellaneous
XI.ar - Calciphylaxis XII.ar XII - Cardiovascular involvement / toxicity
XII.ar - Calcification of the coronary artery walls or atheroma