• J Rheumatol · Jun 2010

    Limited diagnostic value of unilateral sacroiliitis in scintigraphy in assessing axial spondyloarthritis.

    • In-Ho Song, Henning Brandt, Martin Rudwaleit, and Joachim Sieper.
    • Charité Medical University, Campus Benjamin Franklin, Medical Clinic I, Rheumatology, Hindenburgdamm 30, 12200 Berlin, Germany.
    • J Rheumatol. 2010 Jun 1;37(6):1200-2.

    ObjectiveTo assess the diagnostic value for axial spondyloarthritis (SpA) of unilateral sacroiliitis in scintigraphy in daily clinical practice.MethodsIn 207 patients with chronic back pain, the diagnostic value of scintigraphy was assessed retrospectively. The diagnosis made by the rheumatologist (axial SpA vs no axial SpA) was the standard.ResultsSensitivities of scintigraphy for any (unilateral or bilateral), bilateral, and isolated unilateral sacroiliitis were 64.9%, 40.2%, and 24.7%, respectively. Respective specificities were 50.5%, 57.7%, and 92.8%, resulting in likelihood ratios of 1.3, 1.0, and 3.4.ConclusionScintigraphy of the sacroiliac joints is of limited value for the diagnosis of axial SpA. Unilateral compared to bilateral sacroiliitis is slightly superior, but is associated with a low sensitivity.

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