Inclusion Body Myositis (IBM)

Inclusion body myositis (IBM) is a slowly progressive inflammatory disorder of muscle. Patients are generally over age 50 and it is more common in men than in women. The disease begins with very slowly progressive weakness. Most commonly the disease begins in the quadriceps muscles. This will cause difficulty getting up out of a chair or climbing stairs. It can also affect muscle of the hand early on, and this will lead to difficulty gripping things or opening jars. As the disease progresses it will cause weakness in all muscle groups. Late in the course of the disease, one possible symptom is difficulty swallowing. IBM generally does not cause pain; however, with weakness and immobility there can often be secondary pain.

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