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Color Doppler ultrasonography in patients with subacute thyroiditis
Y Hiromatsu1, M Ishibashi, I Miyake
1Department of Medicine, Kurume University School of Medicine, Fukuoka, Japan. yuji@med.kurume-u.ac.jp
Thyroid : Official Journal of the American Thyroid Association
|January 26, 2000
Summary
Color Doppler ultrasonography effectively differentiates subacute thyroiditis (SAT) from Graves' disease by assessing thyroid vascularity. This noninvasive method aids in monitoring SAT activity and distinguishing it from other thyroid conditions.
Area of Science:
- Endocrinology
- Radiology
- Internal Medicine
Background:
- Subacute thyroiditis (SAT) is an inflammatory thyroid condition often presenting with painful goiter and thyrotoxicosis.
- Differentiating SAT from other thyroid disorders, such as Graves' disease, is crucial for appropriate management.
- Color Doppler ultrasonography (CDUS) is a noninvasive imaging technique that assesses tissue vascularity.
Purpose of the Study:
- To evaluate the utility of CDUS in patients with SAT.
- To compare thyroid vascularization in SAT patients with those of Graves' disease and healthy controls.
- To assess the role of CDUS in differentiating SAT from Graves' disease and monitoring disease activity.
Main Methods:
- CDUS was performed on 18 patients with SAT during acute and recovery stages.
- Thyroid vascularization in SAT patients was compared to 15 untreated Graves' disease patients and 17 controls.
- Correlation between vascularity and serum thyroid hormone levels (FT4, TSH) was analyzed.
Main Results:
- Acute SAT showed low echogenicity without increased vascularity.
- Recovery stage SAT demonstrated isoechogenicity with slightly increased vascularization.
- Graves' disease patients exhibited markedly increased thyroid vascularization, distinct from SAT.
- Vascularity correlated significantly with FT4 and TSH in the recovery stage.
Conclusions:
- CDUS accurately visualizes SAT lesions, showing minimal vascularity in the acute phase and slight increase during recovery.
- CDUS is a valuable, noninvasive tool for differentiating SAT from Graves' disease.
- CDUS aids in evaluating and monitoring the activity and location of SAT lesions.