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Background: Anti-OJ (anti-isoleucyl-tRNA synthetase) autoantibody-positive anti-synthetase syndrome(ASS) is a rare systemic autoimmune diseases that manifest as an inflammatory myopathy and interstitial lung diseas.Case presentation: We present a case of anti-OJ antibody-positive ASS with recurrent joint pain, fever, significantly elevated inflammatory markers, occult myositis but no interstitial pneumonia in a 75-year-old male patient. The patient was misdiagnosed for more than one year. Recurrent hepatocellular carcinoma (HCC) was confirmed after 1 year of the diagnosis of ASS, and the clinical symptoms were relieved after surgical resection. Conclusion: We report this rare case of anti-OJ antibody-positive ASS with atypical manifestations to raise awareness of the disease for clinicians. |
