Inclusion body myositis (IBM) is a rare muscle disease which is characterized by chronic muscle inflammation and weakness. Unlike dermatomyositis and polymyositis, inclusion body myositis affects both proximal (close to the trunk) and distal (away from the trunk) muscles. IBM also has a degenerative component.
Inclusion body myositis is named for the masses of discarded cellular material termed the “bodies” that collect in the muscle tissue. IBM causes muscle weakness of the wrists and fingers, the muscles of the front of the thigh and the muscles responsible for lifting the foot.
IBM affects adults over the age of 30 but typically affects adult males over the age of 50. There is no cure for (IBM) and the typical treatments used for other forms of myositis often do not work. Exercise is an important treatment for IBM patients.
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