In which disease are the lung's air spaces abnormally diluted and the lungs' walls distended?

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Emphysema is a lung disease characterized by the abnormal dilation of the lung's air spaces and the distension of the lungs' walls, leading to difficulty in breathing. Glaucoma is a disease of the eyes, bronchitis is a respiratory disease characterized by inflammation of the bronchial tubes, and lung cancer is a cancerous growth in the lungs.

In Which Disease Are the Lung's Air Spaces Abnormally Diluted