Autoimmune Diseases · Pathology

Anti-Jo-1 antibodies are most commonly found in patients with which condition?

  1. Primary Sjogren syndrome
  2. Polymyositis / Dermatomyositis
  3. Primary biliary cholangitis
  4. Antiphospholipid antibody syndrome
Show answer and explanation

Correct answer: Polymyositis / Dermatomyositis

Anti-Jo-1 is an antibody against histidyl-tRNA synthetase. It is present in about 25% of patients with polymyositis or dermatomyositis, especially those with interstitial lung disease and 'mechanic's hands'.

Difficulty: Medium Question 15 of 20

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