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© 1996 British Society for Rheumatology

case-report

SPINAL PSEUDOARTHROSIS COMPLICATING ANKYLOSING SPONDYLITIS: A REPORT OF TWO PATIENTS

T. PETTERSSON, L. LAASONEN*, M. LEIRISALO-REPO and P. TERVAHARTIALA*

Departments of Medicine Helsinki University Central Hospital Helsinki, Finland
*Radiology, Helsinki University Central Hospital Helsinki, Finland

Correspondence to: Correspondence to: T. Pettersson, Department of Medicine, Helsinki University Central Hospital, Kasarmikatu 11–13, FTN-00130 Helsinki, Finland.

Two middle-aged men with long-standing ankylosing spondylitis presented with recurrence of back symptoms after minor traumas. Clinical and radiographic findings were suggestive of spinal pseudoarthrosis at the L2/L3 and T11/T12 level, respectively, but the possibility of infectious spondylitis remained a concern. On granulocyte scintigraphy, the affected regions were distinguished by showing decreased activity. Magnetic resonance imaging clearly demonstrated the extent of the lesions and, in one of the patients, revealed spinal canal compression, which necessitated surgical treatment. The other patient gradually improved on conservative therapy

KEY WORDS: Ankylosing spondylitis, Bone scintigraphy, Granulocyte scintigraphy, Magnetic resonance imaging, Spinal pseudoarthrosis


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