Hypersensitivity pneumonitis and extrinsic allergic alveolitis are respiratory disorders involving inflammation of the airways or alveoli of the lungs.
Pleural effusion is a lung disease in which fluid accumulates in the pleura, two ballon-like linings which surround and separate the lungs from the heart.
Bronchiectasis is a lung disease. Inflammation of the bronchi and bronchioles leads to permanent dilation. Mucus accumulates, causing chronic infection.