-Extra-articular manifestations: .8% of patients had heel pain, 8.% had iritis or iridocyclitis, . % had symptoms of ur关节外表现： .8％的患者出现足跟痛，8.％出现虹膜炎或虹睫炎，. ％有泌尿系症状，0. ％有慢性腹泻史。