Which symptom is most characteristic of polymyositis?

Which symptom is most characteristic of polymyositis?

• A. Proximal muscle weakness with difficulty performing activities of daily living
• B. Distal sensory loss
• C. Joint swelling without weakness
• D. Eye pain with photophobia

Answer: (A)

Proximal muscle weakness is the hallmark feature being tested. In inflammatory myopathies like polymyositis, the muscles closest to the trunk—the shoulder and hip girdles—are primarily affected. This leads to difficulty performing daily activities such as getting out of a chair, climbing stairs, or combing hair. The weakness is typically symmetric and progressive, and the problem lies in the muscle tissue itself, not in the nerves, which is why sensation is usually preserved. This distinction helps explain why other options aren’t characteristic. Distal sensory loss points to a nerve or spinal issue rather than a primary muscle problem. Joint swelling without weakness suggests a primary joint disease like arthritis rather than a myopathy. Eye pain with photophobia indicates an inflammatory process in the eye, not a muscle disorder. So the symptom that best fits polymyositis is proximal muscle weakness causing difficulty with activities of daily living.

Proximal muscle weakness is the hallmark feature being tested. In inflammatory myopathies like polymyositis, the muscles closest to the trunk—the shoulder and hip girdles—are primarily affected. This leads to difficulty performing daily activities such as getting out of a chair, climbing stairs, or combing hair. The weakness is typically symmetric and progressive, and the problem lies in the muscle tissue itself, not in the nerves, which is why sensation is usually preserved.

This distinction helps explain why other options aren’t characteristic. Distal sensory loss points to a nerve or spinal issue rather than a primary muscle problem. Joint swelling without weakness suggests a primary joint disease like arthritis rather than a myopathy. Eye pain with photophobia indicates an inflammatory process in the eye, not a muscle disorder.

So the symptom that best fits polymyositis is proximal muscle weakness causing difficulty with activities of daily living.