Inflammation of muscle tissue, causing pain, tenderness, and weakness. Types of myositis include myositis ossificans (in which damaged muscle is replaced by bone), polymyositis, and dermatomyositis.
In?ammation of a muscle. (See also MUSCLES, DISORDERS OF – In?ammation (myositis)).
n. any of a group of muscle diseases in which inflammation and degenerative changes occur. *Polymyositis is the most commonly occurring example, but myositis may be found in relation to systemic *connective-tissue diseases and a minority are caused by bacterial or parasitic infections.