Localized Bleeding |
Infections |
Mycobacteria (TB most common) |
Necrotizing bacterial pneumonia (particularly Klebsiella and Staphylococcus aureus) |
Lung abscess |
Mycetoma (Aspergillus most common) |
Bronchiectasis (eg, cystic fibrosis or immune deficiencies) |
Parasites (hydatid cyst, paragonimiasis) |
Leptospirosis |
Endocarditis |
Tumors |
Bronchogenic carcinoma (ie, squamous cell) |
Pulmonary metastatic disease |
Bronchial adenoma |
Sarcoma |
Pulmonary vascular problems |
Pulmonary arteriovenous malformations (eg, Rendu-Osler-Weber syndrome) |
Pulmonary embolus with infarction |
Pulmonary aneurysm (eg, Behçet syndrome) |
Dieulafoy lesion |
Mitral stenosis |
Coagulopathy (usually requires coexisting mucosal disruption) |
Thrombocytopenia or platelet dysfunction (eg, von Willebrand disease, uremia) |
Hemophilia A or B |
Prolonged coagulation tests (due to coagulation factor production or consumption defect) |
Trauma |
Iatrogenic |
Biopsies |
Lung transplant |
Atrial fibrillation ablation (cryotherapy or radiofrequency) |
Thoracic surgery |
Airway/Vascular stent erosion |
Brachytherapy |
Pulmonary artery catheterization with pulmonary arterial rupture |
Tracheoinominate fistula (rare complication of tracheostomy) |
Miscellaneous |
Lymphangioleiomyomatosis |
Catamenial (endometriosis) |
Cryptogenic |
Broncholithiasis |
Sarcoidosis (usually from cavitary lesions with mycetoma) |
Tracheoinominate fistula |
Bronchiectasis (anatomic abnormalities) |
Chronic obstructive pulmonary disease |
Foreign body aspiration |
Blast lung injury |
Fibrosing mediastinitis |
Amyloidosis |
Diffuse Bleeding |
Capillaritis (seen on biopsy) |
Drug- and chemical-induced (propylthiouracil, phenytoin, retinoic acid) |
Connective tissue diseases (ie, systemic lupus erythematosus, rheumatoid arthritis, mixed connective tissue disease, systemic sclerosis, antiphospholipid antibody syndrome, polymyositis) |
Systemic vasculitides (Behçet, cryoglobulinemia, IgA nephropathy, microscopic polyangiitis, granulomatous vasculitis, pauci-immune, Henoch-Schonlein purpura) |
Bland hemorrhage (seen on biopsy) |
Connective tissue diseases (ie, systemic lupus erythematosus, Goodpasture syndrome) |
Drugs (anticoagulant and antiplatelet therapy-glycoprotein IIa/IIIb inhibitors) |
Other (pulmonary veno-occlusive disease, mitral stenosis, idiopathic pulmonary hemosiderosis) |
Diffuse alveolar damage with bleeding (seen only on biopsy) |
Infection (any infection that can cause ARDS) |
Drugs (amiodarone, crack cocaine, nitrofurantoin, penicillamine, sirolimus, most cytotoxic drugs) |
Connective tissue diseases (systemic lupus erythematosus, rheumatoid arthritis, polymyositis) |
Other (pulmonary capillary hemangiomatosis, pulmonary infarct, ARDS of any cause) |