✦ LIBER ✦

Decreased salivary gland function in patients with autoimmune thyroiditis

✍ Scribed by Cheng-Pei Chang; Yu-Chien Shiau; Jhi-Joung Wang; Shung-Tai Ho; Chia-Hung Kao

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 129 KB
Volume: 25
Category: Article
ISSN: 1043-3074
DOI: 10.1002/hed.10192

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Background/Aims.

It has been speculated that impaired salivary flow contributes to autoimmune thyroiditis (chronic thyroiditis, Hashimoto's thyroiditis). To test this hypothesis, salivary function was measured by quantitative salivary scintigraphy in autoimmune thyroiditis patients, as well as in age‐ and gender‐matched controls for comparison.

Methodology.

One hundred and twenty patients with an autoimmune thyroiditis history of more than 10 years each and 36 healthy controls were enrolled in the study. All the 120 autoimmune thyroiditis patients had good blood sugar control. None had autonomic neuropathy. These 120 autoimmune thyroiditis patients were separated into two subgroups: group 1, 60 patients with xerostomia; and group 2, 60 patients without xerostomia. After intravenous injection of 5 mCi Tc‐99m pertechnetate, sequential images at 1 min/frame were acquired for 30 min. The first‐ and 15th‐minute uptake ratios (UR) were calculated from the tracer uptakes in the four major salivary glands over the background regions of interest (ROIs). Saliva excretion was stimulated by 1 tablet of 200 mg ascorbic acid given orally 15 min after injection of the tracer. Then, the maximal excretion ratios (ER) of the four major salivary glands after sialagogue stimulation were calculated.

Results.

Impaired salivary function, represented by significantly decreased UR and ER values, in autoimmune thyroiditis patients with xerostomia was demonstrated in this study. In addition, there was a significantly higher prevalence of salivary gland dysfunction in group 1 patients than in group 2 patients.

Conclusions.

Significantly poorer salivary function was found in autoimmune thyroiditis patients with xerostomia compared with autoimmune thyroiditis patients without xerostomia and healthy controls by means of objective and quantitative salivary scintigraphy. © 2003 Wiley Periodicals, Inc. Head Neck 25: 132–137, 2003

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