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Sarcoidosis : A case Based Discussion
Updated on Sep, 2026
Health and Fitness, Other Health and Fitness, Medical Terminology
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Sarcoidosis is a disease characterized by the growth of tiny collections of inflammatory cells (granulomas) in any part of your body — most commonly the lungs and lymph nodes. But it can also affect the eyes, skin, heart and other organs.
The cause of sarcoidosis is unknown, but experts think it results from the body's immune system responding to an unknown substance. Some research suggests that infectious agents, chemicals, dust and a potential abnormal reaction to the body's proteins (self-proteins) could be responsible for the formation of granulomas in people who are genetically predisposed.
There is no cure for sarcoidosis, but most people do very well with no treatment or only modest treatment. In some cases, sarcoidosis goes away on its own. However, sarcoidosis may last for years and may cause organs.
Signs and symptoms of sarcoidosis vary depending on which organs are affected. Sarcoidosis sometimes develops gradually and produces symptoms that last for years. Other times, symptoms appear suddenly and then disappear just as quickly. Many people with sarcoidosis have no symptoms, so the disease may be discovered only when a chest X-ray is done for another reason.
Sarcoidosis can begin with these signs and symptoms:
Pain and swelling in joints, such as the ankles
Sarcoidosis most often affects the lungs and may cause lung problems, such as:
Persistent dry cough
Sarcoidosis may cause skin problems, which may include:
A rash of red or reddish-purple bumps, usually located on the shins or ankles, which may be warm and tender to the touch
Disfiguring sores (lesions) on the nose, cheeks and ears
Areas of skin that are darker or lighter in color
Growths under the skin (nodules), particularly around scars or tattoos
Sarcoidosis can affect the eyes without causing any symptoms, so it's important to have your eyes checked regularly. When eye signs and symptoms do occur, they may include:
Burning, itching, or dry eyes
Sensitivity to light
Signs and symptoms related to cardiac sarcoidosis may include:
Shortness of breath (dyspnea)
Irregular heartbeats (arrhythmias)
Rapid or fluttering heartbeat (palpitations)
Swelling caused by excess fluid (edema)
Sarcoidosis can also affect calcium metabolism, the nervous system, the liver and spleen, muscles, bones and joints, the kidneys, lymph nodes, or any other organ.
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