Diffuse interstitial pneumonia (infiltrating lung disease). Coloured axial computed tomography (CT) scan through the lungs (dark blue) of a 55-year-old male patient, showing diffuse interstitial pneumonia. This is an inflammatory condition affecting the tissue and space around the air sacs of the lungs, and may result from a variety of causes. Typical symptoms include cough, chest pain, and trouble breathing, and treatment depends on the cause.
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