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Bronchiolitis Obliterans
Aka: Bronchiolitis Obliterans
- See Also
- Bronchiolitis Obliterans with Organizing Pneumonia
- Pathophysiology
- Obstruction of Bronchioles by granulation tissue
- Triggered by injury to Bronchiolar epithelium
- Response to Bronchiolar reinjury during repair phase
- Results in excessive granulation tissue proliferation
- Causes
- Inhalation of toxic fumes
- Exposure to mineral dust
- Transplantation
- Bone Marrow transplant with graft-versus-host disease
- Heart-Lung Transplantation
- Hypersensitivity pneumonitis
- Medications: Penicillamine
- Infection
- Mycoplasma pneumoniae
- Legionella
- Viral respiratory infections
- Rheumatologic Conditions
- Rheumatoid Arthritis
- Systemic Lupus Erythematosus
- Dermatomyositis
- Polymyositis
- Symptoms
- Non-productive cough with Dyspnea
- Onset 2-8 weeks after respiratory injury (see causes)
- Signs
- Expiratory Wheezes
- Imaging: Chest XRay
- Variable pattern (may be normal)
- Diffuse nodular pattern
- Distal hyperinflation