强直性脊柱炎(Ankylosing spondglitis,AS)是一种慢性进行性炎性疾病,主要累及骶髂关节、脊柱、脊柱骨软组织及四肢关节,表现为椎间盘纤维环和纤维环附近结缔组织和骨化椎间关节、肋椎关节和四肢关节的炎症和增生,严重者可丧失劳动能力。所谓的早期AS,一般是指骶髂关节炎≤Ⅱ级 Ankylosing spondylitis (AS) is a chronic and progressive inflammatory disease involving the sacroiliac joints, spine, spine and soft tissue and limbs and joints. It is characterized by intervertebral disc annulus and connective tissue near the annulus fibrosus Joints, fusiform joints and limbs joint inflammation and hyperplasia, severe cases can lose the ability to work. The so-called early AS, generally refers to sacroiliac joint ≤ Ⅱ level