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The ESTIMABL2 randomized trial evaluated whether patients with low-risk differentiated thyroid cancer could safely avoid routine postoperative radioactive iodine after thyroid surgery. The study found that a no-radioiodine strategy was non-inferior for the primary disease-control endpoint in appropriately selected low-risk patients. This is an important example of treatment de-escalation in endocrine oncology: once a cancer has been completely or appropriately resected and classified as low risk, additional ablation is not automatically required for every patient. For endocrine surgeons, the practical implication is that postoperative management should be based on individualized recurrence risk rather than a one-size-fits-all protocol. Decisions must integrate pathology, surgical completeness, staging, thyroglobulin monitoring and the planned follow-up pathway. Avoiding unnecessary radioactive iodine can reduce treatment burden and prevent potential adverse effects while preserving excellent disease control in selected patients. The trial therefore strengthens a more conservative, risk-adapted approach to differentiated thyroid cancer care.

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The ESTIMABL2 randomized trial evaluated whether patients with low-risk differentiated thyroid cancer could safely avoid routine postoperative radioactive iodine after thyroid surgery. The study found that a no-radioiodine strategy was non-inferior for the primary disease-control endpoint in appropriately selected low-risk patients. This is an important example of treatment de-escalation in endocrine oncology: once a cancer has been completely or appropriately resected and classified as low risk, additional ablation is not automatically required for every patient. For endocrine surgeons, the practical implication is that postoperative management should be based on individualized recurrence risk rather than a one-size-fits-all protocol. Decisions must integrate pathology, surgical completeness, staging, thyroglobulin monitoring and the planned follow-up pathway. Avoiding unnecessary radioactive iodine can reduce treatment burden and prevent potential adverse effects while preserving excellent disease control in selected patients. The trial therefore strengthens a more conservative, risk-adapted approach to differentiated thyroid cancer care.
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