Abstract
Autoantibodies against aminoacyl-tRNA synthetases (ARSs) are highly specific for myositis and/or interstitial lung disease. We report a rare case of double positive antibodies (anti-EJ antibody, the least common among anti-aminoacyl-tRNA synthetase antibodies, and anti-cyclic citrullinated peptide antibody, reported to be specific for rheumatoid arthritis) in a patient who presented with interstitial lung disease and later developed rheumatoid arthritis. The patient did not have clinically apparent myositis over a period of careful follow-up of several years. The initial pulmonary pathologic findings showed a nonspecific interstitial pneumonia pattern, with the formation of lymphoid follicles, which should be recognized as the first manifestation of rheumatoid arthritis.
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