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To evaluate different aspects of articular involvements (prevalence, types, relation to extra‐articular manifestations, etc.) in Iranian patients with Behcet's disease (BD).

In a prospective study, all patients with BD attending an outpatient BD clinic were enrolled. The type of articular involvements (peripheral or axial), involved joints, duration of attacks and their relation to extra‐articular manifestations, human leukocyte antigen (HLA)‐B5 and HLA‐B27 were evaluated. Data analysis was done by using descriptive statistical indices such as mean and confidence interval. The comparisons were done by chi‐square test.

In a 5‐year period, 2312 patients were recruited. Musculoskeletal manifestations were recorded in 430 patients (190 without previous history of these involvements). The remaining 1882 patients showed no musculoskeletal involvements, of which 753 had past histories of …