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Optimization of 131I ablation in patients with differentiated thyroid carcinoma: comparison of early outcomes of treatment with 100 mCi versus 60 mCi
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Abstract
Material and methods: 224 DTC patients with primary tumor > 1 cm of diameter or multifocal were randomised into prospective clinical trial. Patients with extrathyroideal extension of primary tumor and nodal metastases or M1 were not enrolled. 99 patients received 60 mCi, and 125 - 100 mCi of radioiodine as the first ablative dose.
Results: The effectiveness of thyroid ablation was evaluated after one year, during endogenous TSH (thyroid stimulating hormone) stimulation, and after two years during Lthyroxine therapy. Whole body scintigraphy (WBS) was performed under thyroxine withdrawal and thyroglobulin serum level was assessed. Distant micrometastases were detected in 9.8% of patients by post-therapy WBS, 11 patients in group A treated with 60 mCi and 11 in group B treated with 100 mCi. In other patients no symptoms of persistent disease were detected. At one year follow up full remission was diagnosed in 176 patients: 76 in group A and 100 in group B. The remaining ones, 13.3% and 11.2% respectively, received the second course of 131I for remnant ablation. There were no statistically significant differences in Tg (thyroglobulin) serum level either 12 or 24 months after 131I treatment.
Conclusions: Our evaluation of early efficacy of adjuvant radioiodine treatment in low risk DTC patients shows no differences between two radioiodine activities - 60 and 100 mCi in relation to thyroid ablation. Thus, the activity of 60 mCi is recommended.
Abstract
Material and methods: 224 DTC patients with primary tumor > 1 cm of diameter or multifocal were randomised into prospective clinical trial. Patients with extrathyroideal extension of primary tumor and nodal metastases or M1 were not enrolled. 99 patients received 60 mCi, and 125 - 100 mCi of radioiodine as the first ablative dose.
Results: The effectiveness of thyroid ablation was evaluated after one year, during endogenous TSH (thyroid stimulating hormone) stimulation, and after two years during Lthyroxine therapy. Whole body scintigraphy (WBS) was performed under thyroxine withdrawal and thyroglobulin serum level was assessed. Distant micrometastases were detected in 9.8% of patients by post-therapy WBS, 11 patients in group A treated with 60 mCi and 11 in group B treated with 100 mCi. In other patients no symptoms of persistent disease were detected. At one year follow up full remission was diagnosed in 176 patients: 76 in group A and 100 in group B. The remaining ones, 13.3% and 11.2% respectively, received the second course of 131I for remnant ablation. There were no statistically significant differences in Tg (thyroglobulin) serum level either 12 or 24 months after 131I treatment.
Conclusions: Our evaluation of early efficacy of adjuvant radioiodine treatment in low risk DTC patients shows no differences between two radioiodine activities - 60 and 100 mCi in relation to thyroid ablation. Thus, the activity of 60 mCi is recommended.
Keywords
differentiated thyroid cancer; 131I remnant ablation
About this articleTitle
Optimization of 131I ablation in patients with differentiated thyroid carcinoma: comparison of early outcomes of treatment with 100 mCi versus 60 mCi
Journal
Issue
Article type
Original paper
Pages
374-379
Published online
2006-07-07
Page views
610
Article views/downloads
1285
Bibliographic record
Endokrynol Pol 2006;57(4):374-379.
Keywords
differentiated thyroid cancer
131I remnant ablation
Authors
Aleksandra Kukulska
Jolanta Krajewska
Józef Roskosz
Daria Handkiewicz-Junak
Michał Jarząb
Ewa Paliczka
Zbigniew Puch
Zbigniew Wygoda
Elżbieta Gubała
Barbara Jarząb
