Adjuvant Radiotherapy in High Risk Locally Advanced DTC

February 25, 2026 updated by: Yu Wang, Fudan University

The Role of Adjuvant Radiotherapy in High Risk Locally Advanced Differentiated Thyroid Cancer：a 1:1 Randomized Phase III Clinical Trial

This study is a phase III randomized controlled clinical trial on the role of adjuvant radiotherapy in high-risk locally advanced differentiated thyroid cancer. Patients who meet the inclusion criteria were randomly assigned 1:1 to either the experimental group (adjuvant radiotherapy+RAI) or the control group (RAI), with LRFS as the primary endpoint of the study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
124

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
      • Shanghai, China
        • Recruiting
        • Fudan Univeristy Shanghai Cancer Center
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. The patient voluntarily joined this study and signed an informed consent form;
  2. Age: ≥ 14 years old,<80 years old, male or female not limited;
  3. Histopathological diagnosis of differentiated thyroid cancer;
  4. Surgical total or near total thyroidectomy;
  5. The surgery did not achieve R0 resection, and R1/ R2 resection was performed. The volume of residual tumor in R2 resected patients is less than 2cm3;
  6. The main organ functions are normal;
  7. Good compliance and cooperation with follow-up.

Exclusion Criteria:

  1. Previously received radiation therapy for the head and neck area;
  2. Differentiated thyroid cancer with poorly differentiated, or undifferentiated components;
  3. There is distant metastasis;
  4. Previously received 131I treatment;
  5. Previously received or currently receiving targeted therapy, immunotherapy, chemotherapy;
  6. Within 5 years or simultaneously suffering from other active malignant tumors. Cured local tumors, such as skin basal cell carcinoma, skin squamous cell carcinoma, superficial bladder cancer, prostate carcinoma in situ, cervical carcinoma in situ, breast carcinoma in situ, can be included in the group;
  7. Pregnant or lactating women;
  8. Other physical illnesses that affect patients' ability to receive standard treatment;
  9. According to the researchers' assessment, there may be other factors that could force the subjects to terminate the study, such as suffering from other serious illnesses (including mental illnesses) that require concurrent treatment, severe abnormal laboratory test values, family or social factors that may affect the safety of the subjects or the collection of experimental data;
  10. Individuals with claustrophobia who are unable to undergo radiation therapy;
  11. Patients deemed unsuitable for inclusion by other attending physicians.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Radiotherapy + RAI
Patients in the experimental group would receive radiotherapy and RAI.
Radiation: Radiotherapy
Ppatients would receive external radiation therapy within 6 weeks after surgery, using intensity-modulated radiation therapy (IMRT) or volume modulated radiation therapy (VMAT) techniques. RAI would be administered as standard care. The treatment window is within 6 months after surgery.
Other: radioiodine treatment
RAI would be delivered based on the condition of residual lesions after surgery. The treatment window is within 6 months after surgery.
Active Comparator: RAI
Patients in the control group would receive RAI.
Other: radioiodine treatment
RAI would be delivered based on the condition of residual lesions after surgery. The treatment window is within 6 months after surgery.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Local-regional Recurrence Free Survival （LRFS）
Time Frame: 5 years after surgery
The time from surgery to the occurrence of local-regional tumor recurrence based on the RECIST 1.1. The definition of local areas includes thyroid area, cervical I-VII lymph nodes, and retropharyngeal lymph nodes.
5 years after surgery

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Local-regional Recurrence Rate，LRR
Time Frame: 5 years after surgery
The percentage of patients with local-regional recurrence in the total number of patients.
5 years after surgery
Progression Free Survival，PFS
Time Frame: 5 years after surgery
The time from surgery to tumor progression, including local recurrence and distant metastasis.
5 years after surgery
Overall Survival，OS
Time Frame: 5 years after surgery
The time from surgery to patient death.
5 years after surgery
Adverse Events，AE
Time Frame: 5 years after surgery
The name of AE (based on NCI-CTCAE V5.0 criteria), severity, duration, and correlation with radiotherapy;
5 years after surgery
Quality of Life as assessed by QLQ-H&N35
Time Frame: 5 years after surgery
Patients in the experimental group were evaluated for QoL within 1 week before the start of radiotherapy, 1 week after the end of radiotherapy, 3 months after the end of radiotherapy, and 1, 3, and 5 years after surgery. The control group patients were evaluated for QoL at 1 month, 3 months, 1 year, 3 years, and 5 years after surgery. The QoL evaluation scale adopts the EORTC Quality of Life Measurement Scale QLQ-H&N35 (V1.0) .
5 years after surgery
Quality of Life as assessed by QLQ-C30
Time Frame: 5 years after surgery
Patients in the experimental group were evaluated for QoL within 1 week before the start of radiotherapy, 1 week after the end of radiotherapy, 3 months after the end of radiotherapy, and 1, 3, and 5 years after surgery. The control group patients were evaluated for QoL at 1 month, 3 months, 1 year, 3 years, and 5 years after surgery. The QoL evaluation scale adopts the EORTC Quality of Life Measurement Scale QLQ-C30 (V3.0) Chinese version.
5 years after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Fudan University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 11, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2031

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2031

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 26, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 14, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 19, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 27, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 25, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ARAD-TC

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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