DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Sarcoidosis. Coloured frontal chest X-ray of the lungs of a 54-year-old man with pulmonary sarcoidosis. Affected lung tissue shows up as opaque patches (orange, left and right). Also known as Boeck's disease, this is a chronic inflammation of the lymph nodes or organs. It causes multiple granulomas (nodular growths), which are similar to tuberculosis. The disease has no known cause. Medical intervention is not always necessary, but if it is needed it is in the form of corticosteroid drugs.
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