Bronchiectasis is described as destruction of supporting smooth muscle and elastic tissue, bronchi become dilated and smaller bronchioles are obliterated due to fibrosis.

• A. Bronchiectasis
• B. Emphysema
• C. Asthma
• D. COP

Answer: (A)

The description describes a pattern where the bronchi lose their structural support due to destruction of elastic tissue and smooth muscle, with fibrosis that causes permanent dilation of the airways and obliteration of smaller bronchioles. This combination—irreversible bronchial dilation with wall destruction and fibrotic narrowing of small airways—is the hallmark of bronchiectasis. Emphysema mainly involves destruction of alveolar walls leading to airspace enlargement rather than dilation of the bronchi themselves. Asthma features reversible airway narrowing with mucus plugging and airway remodeling, but not the destructive, irreversible bronchial dilation described here. COPD is a broader category of chronic airflow limitation that can include elements of chronic bronchitis or emphysema, but the specific pattern of bronchial wall destruction and dilation points to bronchiectasis.