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Annals of the Rheumatic Diseases logoLink to Annals of the Rheumatic Diseases
. 2002 Sep;61(9):774–778. doi: 10.1136/ard.61.9.774

Abnormal regional cerebral blood flow on 99mTc ECD brain SPECT in patients with primary Sjögren's syndrome and normal findings on brain magnetic resonance imaging

C Chang 1, Y Shiau 1, J Wang 1, S Ho 1, A Kao 1
PMCID: PMC1754217  PMID: 12176800

Abstract

Objective: Technetium-99m ethyl cysteinate dimer (99mTc ECD) single photon emission computed tomography (SPECT) of the brain was used to detect abnormal regional cerebral blood flow (rCBF) in patients with primary Sjögren's syndrome (pSS) and normal findings on brain magnetic resonance imaging (MRI).

Methods: 99mTc ECD brain SPECT was performed to detect brain lesions showing hypoperfusion in 32 female patients with pSS and definite neuropsychiatric symptoms or signs. Seventeen female patients with pSS without neuropsychiatric symptoms and signs were included as a control group for comparison. All of the 49 patients with pSS had normal findings on brain MRI.

Results: 99mTc ECD brain SPECT showed brain regions with hypoperfusion in 18 (56.3%) of the 32 patients, and parietal lobes were the most common areas with such lesions. By contrast, 99mTc ECD brain SPECT showed brain regions with hypoperfusion in only three (17.6%) of the 17 patients with pSS without neuropsychiatric symptoms or signs.

Conclusion: This study suggests that 99mTc ECD SPECT is a sensitive tool for detecting regions of hypoperfusion in the brains of patients with pSS and neuropsychiatric symptoms or signs and normal findings on brain MRI. However, a review of the literature showed that the 99mTc ECD SPECT findings in patients with pSS were non-specific.

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Figure 1 .

Figure 1

A 40 year old healthy female control. Normal 99mTc ECD SPECT findings consisted of homogeneous rCBF in the grey matter of the cerebral cortex, basal ganglia, and cerebellum without focal hypoperfusion or visible asymmetry.

Figure 2 .

Figure 2

A 43 year old woman with primary Sjögren's syndrome and definite neuropsychiatric symptoms or signs (patient No 25 in table 1). 99mTc ECD SPECT showed regions of hypoperfusion in the left parietal-temporal lobes and basal ganglion (arrows).

Selected References

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