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Scintigraphic Findings in Ankylosing Spondylitis

W. W. Cross Cancer Institute and University of Alberta, Edmonton, Alberta, Canada

Correspondence: For reprints contact: B. C. Lentle, W. W. Cross Cancer Institute, 11560 University Ave., Edmonton, Alberta, Canada T6G1Z2.

ABSTRACT

A prospective study of bone scintigraphic findings has been carried out in 63 patients, firmly diagnosed as having ankylosing spondylitis. In addition to abnormal uptake of the radiotracer at the sacroiliac joints, a peripheral arthropathy has been a common finding, particularly in the proximal joints, occurring in up to 50% of patients. Increased uptake of radiotracer in the spine has also been found both diffusely and focally. Focal increases have been noted at the apophyseal joints in 40% of patients and in three patients with a sterile intervertebral diskitis, an unusual complication of this disease only diagnosed in two patients after bone scintigraphy.