Rheumatoid nodule

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A rheumatoid nodule is a collection of normal cells including lymphocytes, and fibroblasts that surround a center of fibrinoid necrosis. They are usually subcutaneous especially over boney prominences such in the olecranon. About 5% of rheumatoid arthritis patients have such nodules within 2 years of disease onset, and the cumulative prevalence is about 25%.[1]

  1. ^ Carmona L, González-Alvaro I, Balsa A, Angel Belmonte M, Tena X, Sanmartí R (Sep 2003). "Rheumatoid arthritis in Spain: occurrence of extra-articular manifestations and estimates of disease severity". Ann. Rheum. Dis. 62 (9): 897–900. PMID 12922967. .

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