Ankylosing spondylitis?,”AS usually occurs at age <40 and presents with gradual onset of low back pain. The pain improves with exercise (rather than rest) and can be associated with hip or buttock pain. Other possible findings include anterior uveitis and enthesitis (inflammation of tendon insertion site at bone). AS is an inflammatory disorder that involves primarily the apophyseal (facet) joints of the axial skeleton. Patients with suspected AS require measurement of inflammatory markers (eg, ESR, CRP), HLA-B27 typing

Ankylosing spondylitis?,”AS usually occurs at age <40 and presents with gradual onset of low back pain. The pain improves with exercise (rather than rest) and can be associated with hip or buttock pain. Other possible findings include anterior uveitis and enthesitis (inflammation of tendon insertion site at bone). AS is an inflammatory disorder that involves primarily the apophyseal (facet) joints of the axial skeleton. Patients with suspected AS require measurement of inflammatory markers (eg, ESR, CRP), HLA-B27 typing and imaging of the spine.”