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.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 IV.d IV - Airway involvement
IV.d - Cough (lone) VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) 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 XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy XII.n XII - Cardiovascular involvement / toxicity
XII.n - Cardiovascular collapse - Cardiogenic shock - Hypotension

I.c I - Interstitial/parenchymal lung disease
I.c - Eosinophilic pneumonia (pulmonary infiltrates and eosinophilia) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury V.b V - Pleural and/or pericardial involvement
V.b - Eosinophilic pleural effusion X.a X - Systemic/Distant conditions, syndromes and reactions
X.a - DRES syndrome - DRESS-like reaction X.b X - Systemic/Distant conditions, syndromes and reactions
X.b - Antiphospholipid antibodies w/wo the APL syndrome X.y X - Systemic/Distant conditions, syndromes and reactions
X.y - Subclinical ANA positivity XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy XVII.w XVII - Infections & related conditions
XVII.w - Hypogammaglobulinemia - Antibody deficiency

II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy

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.n I - Interstitial/parenchymal lung disease
I.n - Pulmonary alveolar proteinosis (PAP) II.b II - Pulmonary edema - Acute lung injury - ARDS
II.b - ARDS - Acute lung injury IV.k IV - Airway involvement
IV.k - Bronchiectasis VIII.a VIII - Central-large-upper airway (incl. pharyngeal-nasal) involvement
VIII.a - Angioedema (may cause UAO, asphyxia and death) X.c X - Systemic/Distant conditions, syndromes and reactions
X.c - Capillary leak syndrome (CLS) X.f X - Systemic/Distant conditions, syndromes and reactions
X.f - Anaphylaxis-Anaphylactoid reaction (can be fatal) XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy 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.n XV - Pathology
XV.n - Path: Pulmonary alveolar proteinosis pattern (PAP pattern) 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.o XVII - Infections & related conditions
XVII.o - Nocardia pulmonary/systemic infection

II.a II - Pulmonary edema - Acute lung injury - ARDS
II.a - Pulmonary edema, noncardiogenic (NCPE) XI.b XI - Miscellaneous
XI.b - Chest pain (acute or subacute), lone or prominent XI.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy XII.n XII - Cardiovascular involvement / toxicity
XII.n - Cardiovascular collapse - Cardiogenic shock - Hypotension XVI.d XVI - Imaging
XVI.d - Imaging: Alveolar opacities or haze with a batwing or butterfly distribution

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 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.a IV - Airway involvement
IV.a - Bronchospasm - Wheezing - Asthma IV.d IV - Airway involvement
IV.d - Cough (lone) IV.n IV - Airway involvement
IV.n - Obstructive airway dysfunction (see also IVc, XVx) VI.d VI - Pulmonary vasculopathies
VI.d - Pulmonary vasculitis or capillaritis VII.a VII - Mediastinal involvement
VII.a - Lymphadenopathy (intrathoracic) VII.b VII - Mediastinal involvement
VII.b - Lymphadenopathy with reactive changes VII.m VII - Mediastinal involvement
VII.m - Malignant lymphoma 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.h X - Systemic/Distant conditions, syndromes and reactions
X.h - Eosinophilic granulomatosis with polyangiitis (Churg-Strauss) 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.ab XI - Miscellaneous
XI.ab - Gingival hypertrophy XII.m XII - Cardiovascular involvement / toxicity
XII.m - Cardiac- cardiorespiratory/pulmonary arrest XII.x XII - Cardiovascular involvement / toxicity
XII.x - Sinus arrest XII.as XII - Cardiovascular involvement / toxicity
XII.as - Giant cell myocarditis XIII.b XIII - Neoplastic conditions
XIII.b - Lymphoproliferative disease (pulmonary, endobronchial, endothoracic) XIV.a XIV - Hemoglobinopathies - Abnormal hemoglobin states (acquired)
XIV.a - Methemoglobinemia XV.m XV - Pathology
XV.m - Path: Lymphoid hyperplasia (including nodular- or a lymphocytic interstitial pneumonia pattern) XV.ab XV - Pathology
XV.ab - Path: Pulmonary capillaritis XV.ac XV - Pathology
XV.ac - Path: Pulmonary vasculitis other than capillaritis XV.af XV - Pathology
XV.af - Path: Granulomatous pulmonary vasculitis XIX.a XIX - Cytological, biochemical features of/in BAL, pleural fluid or FNA
XIX.a - BAL: An excess proportion of lymphocytes