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风湿性关节炎和类风湿性关节炎（RA）是比较常见的两种慢性结缔组织病变，均以Ⅲ型变态反应为特征。临床上，尤其在RA早期鉴别较难。通常血清类风湿因子（RA）在临床症状出现6个月后才可表现出阳性。广濑俊一曾报道恶性风湿性关节炎时，血清IgG、类风湿因子也可增高。因此，及
Rheumatoid arthritis and rheumatoid arthritis (RA) are two of the more common chronic connective tissue lesions characterized by type III allergy. Clinically, especially in the early identification of RA more difficult. Serum rheumatoid factor (RA) usually appears positive after 6 months of clinical symptoms. Hirose Junichi once reported malignant rheumatoid arthritis, serum IgG, rheumatoid factor can be increased. So, and