DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Sarcoidosis. Frontal coloured chest X-ray of the lungs of a 52-year-old man with pulmonary sarcoidosis. Affected lung tissue appears as yellow patches. 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 the tubercles formed in tuberculosis. The most commonly affected organs are the lungs, skin and eyes. The disease has no known cause. It can be symptomless and may regress on its own. Medical intervention is not always necessary, but if required is in the form of corticosteroid drugs to reduce inflammation.
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