Plain-English translation of NCT06558981 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
Read our Thyroid Cancer research guide →Phase 3 — Testing in thousands of people, comparing the treatment against what doctors currently use. This is the last big step before approval.
This study is testing whether patients with high-risk, advanced thyroid cancer benefit from receiving radiation therapy in addition to radioactive iodine (RAI) treatment. Everyone in the trial will get radioactive iodine, which is a standard thyroid cancer treatment. Half of the participants will also receive external radiation therapy to the neck area, while the other half will receive only radioactive iodine. The study will measure whether the addition of radiation therapy helps prevent cancer from coming back.
Some patients with thyroid cancer don't have all their cancer removed during surgery, which puts them at high risk for the cancer returning. Doctors want to know if adding radiation therapy to the standard radioactive iodine treatment can help these high-risk patients have better long-term outcomes.
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If you join this trial, you will be randomly assigned to one of two groups. One group will receive radiation therapy plus radioactive iodine treatment, while the other group will receive only radioactive iodine. Your doctors will closely monitor you over time to see whether the cancer returns and how well you're doing. The trial will follow your health and measure how effective each treatment approach is at preventing cancer recurrence.
AI-generated summary from trial data · Jun 10, 2026 · Not medical advice
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