强直性脊椎炎 (ankylosing spondylitis,AS)是主要危害青年人健康的常见风湿性疾病之一 ,其发病率为 0 .3%～0 .4 % [1 ] 。因本病早期临床表现复杂多样 ,易被误诊或漏诊。现将我院近 3年来明确诊断且资料完整的 6 9例 AS患者中 5 0例被院外误诊的原因分析报告如下。1　资料与 Ankylosing spondylitis (AS) is one of the most common rheumatic diseases that endanger the health of young people. Its incidence is 0.3% ~ 0.4% [1]. Due to the early complex clinical manifestations of this disease, easily misdiagnosed or missed diagnosis. Now in our hospital for nearly 3 years to confirm the diagnosis and complete data of 69 cases of AS patients were misdiagnosed outside the hospital 50 cases were analyzed as follows. 1 information and