Validation of quantitative salivary gland scintigraphy in relation to the American-European concensus criteria for Sjögren's syndrome

Nuclear Medicine Communications
Herman P KaldewayMonique M C van Buul

Abstract

The aim of this retrospective study was to evaluate the diagnostic value of semiquantitative parameters in salivary gland scintigraphy (SGS) in the diagnostic work-up of primary Sjögren's Syndrome (SS) using the American-European consensus criteria (AECC) as the gold standard. 99mTc-pertechnetate-SGS was performed in 110 patients with suspected primary SS. Uptake ratios (URs) and excretion fractions (EFs) for all parotid and submandibular salivary glands were calculated. Patients were divided into SS-positive, SS-negative, and SS-equivocal groups on the basis of the AECC criteria. SGS semiquantitative parameters were compared per group and cut-off values were defined. Ninety-six (87%) women and 14 (13%) men with a mean age of 51 years (range: 18-77 years) were included. All patients underwent SGS, labial biopsy, Schirmer's test, and antibody tests (anti-SS-A and anti-SS-B). Twenty-four patients were SS positive, 56 patients were SS negative, and 30 patients were SS-equivocal.UR of the parotid glands did not differ between SS-positive and SS-negative groups [mean (range): 3.4 (1.4-6.9) and 3.9 (2.2-6.5), respectively], whereas UR of the submandibular glands were significantly lower in SS-positive patients [mean (range): 2.7 (1.1...Continue Reading

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