M63: Disorders of muscle in diseases classified elsewhere

M63.3: Myositis in sarcoidosis

Myositis in sarcoidosis is a medical condition whereby the patient experiences inflammation of the muscles (myositis) due to a disease named sarcoidosis. Sarcoidosis is an autoimmune disease where small lumps, or granulomas, develop in the body's tissues due to chronic inflammation. While these granulomas can form in any part of the body, when they develop in muscle tissue, it results in myositis. The symptoms of myositis in sarcoidosis can vary from individual to individual. However, common signs include muscle pain, tenderness, weakness, or even swelling. It's also possible to have no noticeable symptoms in the early stages of the disease. This condition affects the musculoskeletal system and its progression depends on the severity and location of the inflammation. As an autoimmune condition, its onset is often not related to lifestyle habits or transmission from individual to individual.