Musculoskeletal and Skin: Osteoporosis, Psoriasis · USMLE Step 1

Which finding is characteristic of psoriatic arthritis rather than osteoarthritis?

  1. Stiffness improving with activity
  2. Symmetric joint space narrowing
  3. Marginal osteophyte formation
  4. Heberden node formation
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Correct answer: Stiffness improving with activity

Psoriatic arthritis produces inflammatory joint symptoms that improve with activity. Osteoarthritis worsens with use.

Difficulty: Medium Question 14 of 20

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