Polymyositis

Focal invasion of Muscle Fiber by Inflammatory Cells

Polymyositis is an inflammatory disease of muscles, causing weakness in the muscles closest to the torso -- usually the shoulder and hip muscles. It is an autoimmune disorder, meaning that a person's white blood cells begin attacking muscles for an unknown reason. The disease is chronic, but the symptoms may come and go. Anyone can get polymyositis, but it is slightly more common in females, and people in middle childhood and their 20s. It is sometimes connected with cancer, scleroderma, and rheumatoid arthritis.

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Cause of Polymyositis
Cures for Polymyositis
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