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External-beam radiation therapy (EBRT)
Source: Thyroid Cancer Treatment (PDQ®)–Health Professional Version, National Cancer Institute.
Source updated: May 9, 2025 · Captured 2026-09-09.
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EBRT is typically reserved for palliative treatment of unresectable or metastatic papillary or follicular thyroid cancer. In some cases, it may be appropriate to give EBRT in the adjuvant setting if there is confirmed or suspected microscopic residual disease that is confirmed or suspected to be refractory to RAI. There are no randomized trials to guide the selection of patients who might benefit from treatment with EBRT. The decision to use EBRT is based on retrospective data and clinical judgment.[20]
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