Caspian Journal of Internal Medicine
Babol University of Medical Sciences
Sun, Jul 13, 2025
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Volume 16, Issue 3 (Summer 2025)
Caspian J Intern Med 2025, 16(3): 513-518 |
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Gholami A, Sabbaghi M, Shirafkan H, Mousavie Anijdan S H. 99mTc-pertechnetate cut-off to distinguish Graves' disease from subacute thyroiditis. Caspian J Intern Med 2025; 16 (3) :513-518
URL: http://caspjim.com/article-1-4305-en.html
URL: http://caspjim.com/article-1-4305-en.html
Department of Radiation Technology, Allied Medicine Faculty, Babol University of Medical Sciences, Babol, I.R.Iran , shmosavia@gmail.com
Abstract: (245 Views)
Background: The cause of thyrotoxicosis can be determined through the thyroid uptake of 99mTc-pertechnetate. The goal of the study was to calculate the cut-off value of 99mTc-pertechnetate of the thyroid gland for the differential diagnosis of Graves' disease from subacute thyroiditis.
Methods: A total of 60 patients were included in the study. Based on thyroid scan findings, 30 patients were in the Graves group and 30 of them had been diagnosed as subacute thyroiditis. Biochemical parameters, thyroid scintigraphy, and the percentage thyroidal 99mTc-pertechnetate uptake results were thoroughly assessed.
Results: The mean percentage 99mTc-pertechnetate uptake in Graves group was much higher than that of the subacute thyroiditis group, which was statistically significant (P <0.001). Receiver operating characteristic (ROC) analysis revealed that the uptake cut-off value of 1.1% had the sensitivity and specificity of 97% and 95%, respectively.
Conclusion: The findings depicted that the cutoff value of 1.1% for 99mTc-pertechnetate uptake could be a helpful index to differentiate Graves' disease from subacute thyroiditis, especially when it is difficult to distinguish between the two diseases using conventional diagnostic methods.
Methods: A total of 60 patients were included in the study. Based on thyroid scan findings, 30 patients were in the Graves group and 30 of them had been diagnosed as subacute thyroiditis. Biochemical parameters, thyroid scintigraphy, and the percentage thyroidal 99mTc-pertechnetate uptake results were thoroughly assessed.
Results: The mean percentage 99mTc-pertechnetate uptake in Graves group was much higher than that of the subacute thyroiditis group, which was statistically significant (P <0.001). Receiver operating characteristic (ROC) analysis revealed that the uptake cut-off value of 1.1% had the sensitivity and specificity of 97% and 95%, respectively.
Conclusion: The findings depicted that the cutoff value of 1.1% for 99mTc-pertechnetate uptake could be a helpful index to differentiate Graves' disease from subacute thyroiditis, especially when it is difficult to distinguish between the two diseases using conventional diagnostic methods.
Type of Study: Original Article |
Subject:
Endocrinology
Received: 2024/03/5 | Accepted: 2024/06/12 | Published: 2025/06/20
Received: 2024/03/5 | Accepted: 2024/06/12 | Published: 2025/06/20
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