ABSTRACT
Psoriatic arthritis is a rare inflammatory joint disease associated with radiographic evidence of periarticular bone erosion and sometimes frank joints destruction among psoriatic patients. There have been only a few reports of atlantoaxial subluxation in patients with psoriatic arthritis in the world. The authors report a case of psoriatic arthritis with atlantoaxial subluxation. This 27-year-old man with a three year history of psoriatic skin lesion presented with painful limitation of neck and multiple joint deformities of the hands and feet, etc. We performed combined interspinous and Gallie fusion for the atlantoaxial subluxation and obtained good results of immediate and long term postoperative stability with Philadelphia neck collar only after this procedure.