Autoimmune Diseases · Pathology

Which specific antibody is considered most diagnostic for Drug-Induced Lupus Erythematosus?

  1. Anti-Sm
  2. Anti-Ro (SSA)
  3. Anti-histone
  4. Anti-Jo-1
Show answer and explanation

Correct answer: Anti-histone

Anti-histone antibodies are present in over 95% of drug-induced lupus cases (triggered by drugs like hydralazine or procainamide). Unlike idiopathic SLE, anti-dsDNA antibodies are usually absent in this variant.

Difficulty: Medium Question 3 of 20

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