Radioiodine Therapy of Graves' Disease and the Uptake Paradox
Overview
Affiliations
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.
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.