{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T02:39:53Z","timestamp":1773801593340,"version":"3.50.1"},"reference-count":18,"publisher":"Georg Thieme Verlag KG","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Semin Musculoskelet Radiol"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>A 73-year-old woman with long-standing therapy-refractory rheumatoid arthritis presented with a persistent fever. Chest computed tomography revealed a mass at the right sternoclavicular joint, growing from 33\u2009\u00d7\u200915\u2009mm to 48\u2009\u00d7\u200944\u2009mm over 8 months, with osteolysis and clavicular erosions. Differential diagnoses were rheumatoid arthritis, spondyloarthritis, tuberculosis, and malignancy. Initial biopsy suggested lymphoid malignancy but was nondiagnostic due to necrosis. Rebiopsy indicated a benign lesion. Positron emission tomography\/computed tomography ruled out cancer. The sternoclavicular joint is a fairly common location for rheumatic disease, but autoimmune-related lymphoproliferations are possible. Lesions with progressive growth, bone damage, and systemic symptoms (fever, weight loss, night sweats) require excluding malignancy. Accurate diagnosis depends on interdisciplinary collaboration and histopathologic confirmation.<\/jats:p>","DOI":"10.1055\/a-2808-9748","type":"journal-article","created":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T00:23:12Z","timestamp":1772756592000},"page":"234-238","source":"Crossref","is-referenced-by-count":0,"title":["Sternoclavicular Joint Involvement of Rheumatoid Arthritis Mimicking Malignancy: A Case Report"],"prefix":"10.1055","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2936-6628","authenticated-orcid":false,"given":"Karol","family":"Rz\u0105d","sequence":"additional","affiliation":[{"name":"Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mikkel","family":"\u00d8stergaard","sequence":"additional","affiliation":[{"name":"Copenhagen Center for Arthritis Research (COPECARE), Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark"},{"name":"Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Agnieszka","family":"Fory\u015b","sequence":"additional","affiliation":[{"name":"Clinic and Polyclinic of Rheumatology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Micha\u0142","family":"Nieciecki","sequence":"additional","affiliation":[{"name":"Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joanna","family":"Kisiel","sequence":"additional","affiliation":[{"name":"Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Iwona","family":"Sudo\u0142-Szopi\u0144ska","sequence":"additional","affiliation":[{"name":"Department of Radiology, National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2026,3,5]]},"reference":[{"key":"ref1","volume-title":"Rockwood and Matsen's The Shoulder. 6th ed","author":"M A Wirth","year":"2022"},{"issue":"03","key":"ref2","doi-asserted-by":"crossref","first-page":"372","DOI":"10.1136\/ard.51.3.372","article-title":"Sternoclavicular joint disease in psoriatic arthritis","volume":"51","author":"E Taccari","year":"1992","journal-title":"Ann Rheum Dis"},{"issue":"10","key":"ref3","doi-asserted-by":"crossref","first-page":"1526","DOI":"10.2106\/00004623-199173100-00010","article-title":"The shoulder girdle in ankylosing spondylitis","volume":"73","author":"R J Emery","year":"1991","journal-title":"J Bone Joint Surg Am"},{"issue":"03","key":"ref4","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1097\/00004424-198603000-00007","article-title":"Osteoarthritis of the sternoclavicular joint. 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