PR. MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY PR. MICHEL BRAUNER / ISM / SCIENCE PHOTO LIBRARY
Lungs in hypersensitivity pneumonitis. Axial computed tomography (CT) scan of a section through the chest of a 57-year-old male patient with significant pulmonary fibrosis due to a chronic hypersensitivity pneumonitis. Hypersensitivity pneumonitis (HP, also known as allergic alveolitis or extrinsic allergic alveolitis, EAA) is an inflammation of the alveoli within the lung, and causes impairment of breathing. It is triggered by inhaled organic dusts, and can result in fibrosis (scarring) of the lungs.
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