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Clin Should Elbow. 2019 Mar;22(1):46-49. English. Case Report.
Kim DH , Min S , Lee HJ , Kim HJ , Lee H , Yoon JP .
Department of Orthopaedic Surgery, Kyungpook National University School of Medicine, Daegu, Korea.
Department of Radiology, Kyungpook National University School of Medicine, Daegu, Korea.

A 73-year-old woman presented with a recurrent cystic mass around her left olecranon. She had a history of 8 steroid injections due to elbow pain beginning 3 years ago and twice had undergone aspiration of olecranon bursitis that developed two months prior to presentation. She had been taking medications for hypertension and diabetes with no pertinent past history. On magnetic resonance imaging (MRI), there were multiple nodules in the olecranon bursa, which were isointense to muscle on T1-weighted images and hyperintense to muscle on T2-weighted images. Our initial diagnosis was synovial chondromatosis. On bursoscopy, masses of gray-white colored nodules were observed in the bursa. Finally, synovial chondromatosis and non-tuberculous mycobacterial infection were concurrently diagnosed. In conclusion, uncalcified synovial chondromatosis and rice bodies can have similar visual and MRI characteristics; therefore, we suggest that clinicians should be aware of the possibility of other infections in cases of this type.

Copyright © 2019. Korean Association of Medical Journal Editors.