الفهرس 
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Abstract
Psoriatic arthritis (PsA) is a chronic seronegative form of arthritis associated with psoriasis. The PsA is recognized as having five domains, namely peripheral arthritis, axial disease, dactylitis, enthesitis, skin and nails.
Axial involvement of PsA can be one of the most significant and challenging parts of the evaluation. Unfortunately, there are no specific tools for evaluating axial disease in PsA. In particular, mobility measurements used in AS may be helpful for monitoring axial disease in PsA.
Spondylitis presents clinically with spinal stiffness and pain, while sacroiliitis causes alternating buttock pain. Syndesmophyte formation and bony growth within the spinal ligaments, can also occur in psoriatic spondylitis and cause vertebral fusion. Axial involvement is associated with significantly impaired physical function and quality of life.
The aim of this work was to study spinal involvement in patients with PsA with the clinical and radiographic methods.
Fifty PsA patients were included in this study, and classified into 3 groups based on the absence or presence of axial involvement according to radiological and clinical data.
group (Ι): Patients with peripheral PsA (pPsA) only.