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THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Medical Information--Home Edition
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The musculoskeletal system comprises bones, muscles, joints, ligaments, tendons, and bursae. Any of these components can be injured by trauma or affected by a number of diseases. Different diagnostic tests are available to diagnose musculoskeletal disorders, but the most important element of diagnosis is the doctor's examination.

Common symptoms of musculoskeletal disorders include pain, weakness, stiffness, joint noises, and decreased range of motion. Inflammation can cause pain, swelling, warmth, tenderness, impaired function, and sometimes redness. Inflammation can result from many different musculoskeletal disorders, including autoimmune disorders and infections. Inflammation affects a joint; fluid may accumulate inside the joint, causing swelling and decreased range of motion.

Last full review/revision September 2006 by Michael Jacewicz, MD

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