Postoperative Radioiodine Treatment within 9 Months from Diagnosis Significantly Reduces the Risk of Relapse in Low-Risk Differentiated Thyroid Carcinoma / 대한핵의학회잡지
Korean Journal of Nuclear Medicine
;
: 320-327, 2019.
Article
in English
| WPRIM
| ID: wpr-786492
ABSTRACT
PURPOSE:
Although postoperative radioiodine (RAI) therapy has been used in patients with differentiated thyroid carcinoma (DTC) for many years, there is still lack of data defining the timing of RAI administration. A retrospective analysis was carried out to answer the question whether the time of postoperative RAI treatment demonstrated any impact on long-term outcomes, particularly in low-risk DTC.MATERIAL:
The analyzed group involved 701 DTC patients staged pT(1b)-T₄N₀-N₁M₀, who underwent total thyroidectomy and postoperative RAI therapy. According to the time interval between DTC diagnosis and RAI administration, patients were allocated to one of three groups up to 9 months (N = 150), between 9 and 24 months (N = 323), and > 24 months (N = 228). Median follow-up was 12.1 years (1.5−15.2).RESULTS:
Based on an initial DTC advancement and postoperative stimulated thyroglobulin concentration patients were stratified as a low-, intermediate-, and high-risk group. Low-risk patients, who received RAI therapy up to 9 months, demonstrated significantly lower risk of relapse comparing to those, in whom RAI was administered between 9 and 24 months and after 24 months since DTC diagnosis 0%, 5.5%, and 7.1%, respectively. Regarding intermediate- and high-risk groups, the differences in the timing of postoperative RAI treatment were not significant.CONCLUSION:
If postoperative RAI treatment is considered in low-risk DTC, any delay in RAI administration above 9 months since diagnosis may be related to poorer long-term outcomes.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Recurrence
/
Thyroglobulin
/
Thyroid Gland
/
Thyroidectomy
/
Thyroid Neoplasms
/
Retrospective Studies
/
Follow-Up Studies
/
Diagnosis
Type of study:
Diagnostic study
/
Etiology study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Humans
Language:
English
Journal:
Korean Journal of Nuclear Medicine
Year:
2019
Type:
Article
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