Sjögren's syndrome: comparison of assessments with quantitative salivary gland scintigraphy and contrast sialography.
This study compared the quantitative parameters of salivary gland scintigraphy and the sialographic stages in patients with Sjögren's syndrome.


METHODS
One hundred sixteen patients suspected of having Sjögren's syndrome were examined with salivary gland scintigraphy and contrast sialography. When contrast sialography was used as the gold standard, Sjögren's syndrome was diagnosed in 50 of these 116 patients; Sjögren's syndrome was not seen in the other 66 patients. After injection of 370 MBq 99mTc-sodium pertechnetate, dynamic salivary gland scintigraphy with lemon juice stimulation was performed for 50 min. Functional parameters for the parotid and submandibular glands were calculated, and scintigraphic and sialographic results were compared.


RESULTS
With the progression of sialographic stages from 0 to 4, the quantity of tracer accumulation decreased in the submandibular gland (P < 0.0001), and the quantity of tracer secretion decreased in the parotid gland (P < 0.0001). The sialographic stage in patients with Sjögren's syndrome was correlated with these scintigraphic parameters (P < 0.0001): sialographic stage = 3.243 - 0.337 x (submandibular gland uptake ratio) - 0.026 x (parotid gland maximum secretion).


CONCLUSIONS
The decreased accumulation in the submandibular gland and the decreased secretion in the parotid gland were highly sensitive indicators of salivary gland disease in Sjögren's syndrome. The sialographic stage was correlated with these scintigraphic parameters.
Aung
W
W
Department of Radiology, Faculty of Medicine, Tokyo Medical and Dental University, Japan.
Yamada
I
I
Umehara
I
I
Ohbayashi
N
N
Yoshino
N
N
Shibuya
H
H
D000328:Adult; D003287:Contrast Media; D005260:Female; D006801:Humans; D007472:Iohexol; D008297:Male; D008875:Middle Aged; D010306:Parotid Gland / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D012469:Salivary Glands / Q000000981:diagnostic imaging*; D012796:Sialography; D012859:Sjogren's Syndrome / Q000000981:diagnostic imaging*; D013670:Sodium Pertechnetate Tc 99m; D013363:Submandibular Gland / Q000000981:diagnostic imaging
D003287:Contrast Media; D019275:Radiopharmaceuticals; D007472:Iohexol; D013670:Sodium Pertechnetate Tc 99m