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Abstract Background: Systemic Lupus Erythematosus (SLE) is a prototypic autoimmune disease with diverse clinical manifestations in association with autoantibodies to components of the cell nucleus. SLE as a chronic autoimmune disease has a worldwide distribution. There is a wide variation in the natural history of SLE among different ethnic and geographic groups. Our SLE registry is one of the largest series in Asia-Pacific region. The aim of this study was to show the manifestations of SLE in Iranian patients. Methods: This study is on clinical and Para clinical manifestations of SLE according to the database of the Rheumatology Research Center (RRC), Tehran University of Medical Sciences as a major referral center for rheumatic disease in Iran during the period of 1976 to 2009. Results: A total of 2143 SLE patients were studied. The female to the male ratio was 8.8: 1 and the mean age at the presentation …