Which condition involves dust accumulation in the lungs?

Which condition involves dust accumulation in the lungs?

• A. Asthma
• B. Pneumonia
• C. Pneumoconiosis
• D. Tuberculosis

Answer: (C)

Pneumoconiosis is the condition described by dust accumulation in the lungs from long-term inhalation of mineral particles. When people breathe in dust like silica, coal, or asbestos over years, these particles lodge in the airways and alveoli. The immune system’s macrophages try to clear them but can’t completely remove the particles, leading to chronic inflammation and progressive scarring (fibrosis) of lung tissue. This fibrosis reduces lung compliance and impairs gas exchange, causing symptoms such as chronic coughing and shortness of breath. Asthma involves reversible airway hyperreactivity and obstruction, not dust deposition in the lung tissue. Pneumonia is an infectious process that fills airspaces with fluid and inflammatory cells. Tuberculosis is a mycobacterial infection that forms granulomas in the lungs; its hallmark is infection rather than dust-related deposition. Understanding pneumoconiosis helps explain why exposure history is crucial for diagnosing and managing this condition.

Pneumoconiosis is the condition described by dust accumulation in the lungs from long-term inhalation of mineral particles. When people breathe in dust like silica, coal, or asbestos over years, these particles lodge in the airways and alveoli. The immune system’s macrophages try to clear them but can’t completely remove the particles, leading to chronic inflammation and progressive scarring (fibrosis) of lung tissue. This fibrosis reduces lung compliance and impairs gas exchange, causing symptoms such as chronic coughing and shortness of breath.

Asthma involves reversible airway hyperreactivity and obstruction, not dust deposition in the lung tissue. Pneumonia is an infectious process that fills airspaces with fluid and inflammatory cells. Tuberculosis is a mycobacterial infection that forms granulomas in the lungs; its hallmark is infection rather than dust-related deposition. Understanding pneumoconiosis helps explain why exposure history is crucial for diagnosing and managing this condition.