Vivino FB, Schumacher HR. Synovial fluid characteristics and the lupus erythematosus cell phenomenon in drug-induced lupus. Findings in three patients and review of pertinent literature.
ARTHRITIS AND RHEUMATISM 1989;
32:560-8. [PMID:
2719730 DOI:
10.1002/anr.1780320508]
[Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The characteristics of synovial fluid obtained from 3 patients with drug-induced lupus erythematosus are described. Two patients had "inflammatory" counts of synovial leukocytes, in the range of 2,500-39,000/mm3, with mononuclear predominance in 1 patient and neutrophil predominance in the other. The third patient had "noninflammatory" fluid, with mononuclear predominance. Lupus erythematosus cells formed in vivo were observed in the synovial fluid of 2 of the patients. Biopsy of the synovium of 1 patient showed nonspecific chronic inflammatory changes. Our findings in these patients with drug-induced lupus are indistinguishable from those previously described in patients with idiopathic lupus erythematosus.
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