Which muscles are typically involved in polymyositis?

Updated: Jan 05, 2021
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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The pharyngeal and neck flexor muscles are often involved, causing dysphagia and difficulty in holding up the head. When the patient is first seen, many of the muscles of the trunk, shoulders, hips, upper arms, and thighs are usually involved. In restricted forms of the disease, only the neck or paraspinal muscles (camptocormia) are affected. [20]

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