Chronic lung condition attributed to prolonged exposure to coal dust, which infiltrates the parenchyma of the lungs and leads to formation of dark nodules and impaired breathing. Commonly found in coal miners, may take up to 10 years before symptoms occur. Also associated with urban industrial smoke and dust inhalation. May be asymptomatic, but eventually presents with dyspnea, productive cough, black sputum, lung mass, progressive massive lung fibrosis, and cor pulmonale. Prognosis may not be good for advanced disease with coexisting illness, such as tuberculosis and emphysema.

Damage is irreversible; however, pharmacologic therapies (bronchodilators and corticosteroid drugs), and therapies to remove secretions and prevent complications may be helpful. If chronic respiratory failure develops, bilateral or unilateral lung transplant may be necessary.