» Articles » PMID: 31949364

Radioiodine Therapy of Graves' Disease and the Uptake Paradox

Overview
Specialty Nuclear Medicine
Date 2020 Jan 18
PMID 31949364
Citations 1
Authors
Affiliations
Soon will be listed here.
Abstract

Purpose Of The Study: Radioiodine (I) therapy is approved and well-accepted modality for the treatment of hyperthyroidism. The dosage of I for successful treatment is based on many factors; however, an objective tool to determine the dose was missing. In a retrospective study, we found that high I uptake values required more dose to achieve desirable results contrary to the belief.

Materials And Methods: Clinically and scintigraphically proven Graves' disease patients with high I uptake (>50%) were accrued for this study and block randomized into low-dose (Group I) and high-dose (Group II) groups. Low activity (5 mCi) was administered in Group I and higher activity (10 mCi) in Group II. The patients were followed up after 3 months with thyroid function tests to determine the outcome.

Results: A total of 344 patients were analyzed at the end of 3 months, with 174 in low-dose group and 170 in high-dose group. Euthyroidism/hypothyroidism was achieved in significantly higher number of patients as compared to the low-dose group.

Conclusion: The higher dose of I is required to achieve euthyroidism/hypothyroidism in patients with high I uptake.

Citing Articles

Ultrasound combined with Ki-67 to construct the prognostic model for radioactive iodine therapy outcomes in Graves' disease patients.

Wang Y, Hong L, Yang C, Lv G, Wang K, Huang X Endocr Connect. 2023; 13(2).

PMID: 38108761 PMC: 10831585. DOI: 10.1530/EC-23-0429.

References
1.
Kalinyak J, McDougall I . How should the dose of iodine-131 be determined in the treatment of Graves' hyperthyroidism?. J Clin Endocrinol Metab. 2003; 88(3):975-7. DOI: 10.1210/jc.2002-021801. View

2.
Kristoffersen U, Hesse B, Rasmussen A, Kjaer A . Radioiodine therapy in hyperthyroid disease: poorer outcome in patients with high 24 hours radioiodine uptake. Clin Physiol Funct Imaging. 2006; 26(3):167-70. DOI: 10.1111/j.1475-097X.2006.00666.x. View

3.
Damle N, Bal C, Kumar P, Reddy R, Virkar D . The predictive role of 24h RAIU with respect to the outcome of low fixed dose radioiodine therapy in patients with diffuse toxic goiter. Hormones (Athens). 2013; 11(4):451-7. DOI: 10.14310/horm.2002.1377. View

4.
Catargi B, Leprat F, Guyot M, Valli N, Ducassou D, Tabarin A . Optimized radioiodine therapy of Graves' disease: analysis of the delivered dose and of other possible factors affecting outcome. Eur J Endocrinol. 1999; 141(2):117-21. DOI: 10.1530/eje.0.1410117. View

5.
Abraham R, Srinivasa Murugan V, Pukazhvanthen P, Sen S . Thyroid disorders in women of Puducherry. Indian J Clin Biochem. 2012; 24(1):52-9. PMC: 3453473. DOI: 10.1007/s12291-009-0009-y. View