{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T17:06:27Z","timestamp":1789664787083,"version":"4.0.1"},"reference-count":17,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2022,3,16]],"date-time":"2022-03-16T00:00:00Z","timestamp":1647388800000},"content-version":"vor","delay-in-days":15,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Surgery"],"published-print":{"date-parts":[[2022,3]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>Rice body synovitis (RBS) is a rare disease. It is prone to be developed due to rheumatoid disorder or tuberculosis infection. Additional infectious arthritis (non\u2010tuberculous mycobacterial infection and fungal infection), juvenile arthritis, the onset of adult Still's disease, systemic lupus erythematosus (SLE), seronegative arthritis, and non\u2010specific arthritis. The clinical imaging, histopathological features, and surgical treatment process of a patient were documented combined with literature. Furthermore, differentiation was performed with additional synovitis diseases so that the cognition of synovitis could be enhanced for clinical reference.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case Presentation<\/jats:title><jats:p>The present study reported a 50\u2010year\u2010old female patient who suffered from intermittent left knee pain with limited movement for 9\u2009 years. The conditions were aggravated after long\u2010term standing or walking and remitted after taking a rest, accompanied by noose and jamming. The specialist range of motion (ROM) examinations of the left knee revealed: 30\u00b0 \u2010 0\u00b0 \u2010 110\u00b0 and left McMurray sign (+). Plain MRI scanning revealed that in the left knee cavity and the popliteal fossa area, a large number of low signals on free rice\u2010like bodies were visible inside and the lower femur and the upper tibia exhibited abnormally high signals of patchy lipography. Surgical exploration revealed numerous rice\u2010like free bodies in the suprapatellar bursa, the intercondylar fossa, and the posterior articular capsule. The patient presently has resolution of symptoms after surgical treatment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The RBS of the knee joint is very rare in the clinic. As MRI examination can provide valuable information, clinicians should actively perform MRI examination. Once the disease is diagnosed by examination, surgery is the optimal treatment.<\/jats:p><\/jats:sec>","DOI":"10.1111\/os.13195","type":"journal-article","created":{"date-parts":[[2022,3,17]],"date-time":"2022-03-17T04:13:32Z","timestamp":1647490412000},"page":"628-632","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["A Case of Rice Body Synovitis of the Knee Joint"],"prefix":"10.1111","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3239-2048","authenticated-orcid":false,"given":"Zhao","family":"Haibo","sequence":"first","affiliation":[{"name":"Qingdao University  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wang","family":"Tianrui","sequence":"additional","affiliation":[{"name":"Orthopedics Department of the Affiliated Hospital of Qingdao University  Qingdao 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