Seronegative polyarthritis in giant cell arteritis

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Abstract
Nineteen of 520 patients with biopsy-proven giant cell arteritis were found to have persistent seronegative, symmetric polyarthritis with a mean joint count of 20 (swollen plus tender). In 9 patients in the onset of polyarthritis occurred prior to the diagnosis of giant cell arteritis, 3 had simultaneous onset, and 7 developed polyarthritis within 3 years after the onset of giant cell arteritis. Ten of the 19 patients demonstrated radiographic features of joint space narrowing and/or erosions. In 1 patient in a synovial biopsy was performed, revealing marked multinucleated giant cell infiltration. A persistent seronegative polyarthritis, although uncommon in giant cell arteritis, may be its presenting symptom. Other symptoms of giant cell arteritis should be sought in patients who exhibit this feature, especially in those whose arthritis begins at age 50 or older.

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