Skip to content

Pazopanib Hydrochloride in Treating Patients With Advanced Thyroid Cancer

A Phase II Study of GW 786034 (Pazopanib) in Advanced Thyroid Cancer

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00625846
Enrollment
152
Registered
2008-02-28
Start date
2008-02-22
Completion date
2019-08-13
Last updated
2020-02-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Recurrent Thyroid Gland Carcinoma, Stage III Differentiated Thyroid Gland Carcinoma AJCC v7, Stage III Thyroid Gland Medullary Carcinoma AJCC v7, Stage IVA Differentiated Thyroid Gland Carcinoma AJCC v7, Stage IVA Thyroid Gland Anaplastic Carcinoma AJCC v7, Stage IVA Thyroid Gland Medullary Carcinoma AJCC v7, Stage IVB Differentiated Thyroid Gland Carcinoma AJCC v7, Stage IVB Thyroid Gland Anaplastic Carcinoma AJCC v7, Stage IVB Thyroid Gland Medullary Carcinoma AJCC v7, Stage IVC Differentiated Thyroid Gland Carcinoma AJCC v7, Stage IVC Thyroid Gland Anaplastic Carcinoma AJCC v7, Stage IVC Thyroid Gland Medullary Carcinoma AJCC v7, Thyroid Gland Anaplastic Carcinoma

Brief summary

This phase II trial studies the side effects and how well pazopanib hydrochloride works in treating patients with advanced thyroid cancer. Pazopanib hydrochloride may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth and by stopping blood flow to the tumor.

Detailed description

PRIMARY OBJECTIVE: I. To establish the safety and efficacy of GW786034 (pazopanib hydrochloride) as a therapeutic in patients afflicted with differentiated, medullary and anaplastic thyroid cancers. CORRELATIVE OBJECTIVES: I. Assessment of the impact of therapy with GW786034 on serum/plasma vascular endothelial growth factor (VEGF) levels. II. To explore the potential relationship between changes in thyroglobulin levels and tumor response in patients with advanced differentiated thyroid cancer known to be thyroglobulin antibody negative. OUTLINE: Patients receive pazopanib hydrochloride orally (PO) once daily (QD) on days 1-28. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 6 months for up to 3 years after registration.

Interventions

OTHERLaboratory Biomarker Analysis

Correlative studies

DRUGPazopanib Hydrochloride

Given PO

Sponsors

National Cancer Institute (NCI)
Lead SponsorNIH

Study design

Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
19 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Histologically or cytologically confirmed differentiated, medullary or anaplastic thyroid cancer that is now advanced or metastatic; NOTE: patients with thyroid lymphomas or sarcomas are specifically excluded, as are patients with metastatic disease from other sites of origin to thyroid * Patients with confirmed differentiated thyroid cancer to be enrolled in the expanded/additional differentiated thyroid cancer (DTC) cohort must be thyroglobulin antibody negative * Zero, one or two prior therapeutic regimens (this includes cytotoxic plus non-cytotoxic therapeutic regimens) * Absence of sensitivity to therapeutic radioiodine (differentiated only) * Measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded) as \> 20 mm with conventional techniques or as \> 10 mm with spiral computed tomography (CT) scan; NOTE: disease that is measurable by physical examination only is not eligible * Life expectancy \> 3 months * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0, 1, or 2 (Karnofsky \>= 60%) * Leukocytes \> 3,000/mcL obtained =\< 7 days prior to registration * Absolute neutrophil count \> 1,500/mcL obtained =\< 7 days prior to registration * Platelets \> 100,000/mcL obtained =\< 7 days prior to registration * Total bilirubin =\< 1.5 X institutional upper limit of normal (ULN) obtained =\< 7 days prior to registration (if there is reason to believe that the patient has Gilbert's syndrome, the bilirubin can be fractionated; if the fractionated bilirubin is consistent with Gilbert's syndrome and there is no other possible explanation for the elevated indirect bilirubin, the patient may be eligible for the study if and only if the direct bilirubin is =\< 1.5 X institutional ULN) * Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase \[SGOT\]) \< 2.5 X institutional ULN obtained =\< 7 days prior to registration * Creatinine =\< 1.5 X ULN obtained =\< 7 days prior to registration * Proteinuria =\< + on urinalysis (may re-check) obtained =\< 7 days prior to registration * International normalized ratio (INR) =\< 1.2 X the ULN obtained =\< 7 days prior to registration * Blood pressure (BP) \< 140 mmHg (systolic) and \< 90 mmHg (diastolic); initiation or adjustment of BP medication is permitted prior to registration provided that the average of three BP readings at a visit prior to registration is \< 140/90 mmHg * Objective evidence of tumor progression in the 6 month period prior to GW786034 initiation as assessed by: * Unequivocal progression of objectively measured disease on successive appropriate imaging (e.g. CT scan); in cases of uncertainty of tumor progression, the principal investigator of the study will be available to assist in decisions * Women of child-bearing potential must have a negative serum pregnancy test =\< 7 days prior to registration; NOTE: women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry and for the duration of study participation; should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately; effective contraception is required for all fertile participants in the trial * Ability to understand and the willingness to sign a written informed consent document * Willingness to comply with the requirement of the study * Willingness to donate blood for correlative marker studies; (only applicable to sites within the United States)

Exclusion criteria

* Anaplastic, differentiated, medullary: a total of \> 2 prior therapeutic regimens (this total includes cytotoxic plus non-cytotoxic regimens); Note: enrollment of anaplastic, differentiated, and medullary patients who have had zero, one or two prior therapeutic regimens (cytotoxic plus non-cytotoxic regimens) is allowed - provided therapy ceased \> 21 days prior to registration; * NOTE: the principal investigator of the study should be contacted in the event of uncertainty related patient eligibility based upon prior therapies * Disease that is measurable by physical examination only * Any of the following: * Radiotherapy =\< 4 weeks prior to registration * Major surgery =\< 4 weeks prior to registration * Radiotherapy to \>= 25% of bone marrow * Concurrent therapy with octreotide unless tumor progression on this therapy has been demonstrated * Any other ongoing investigational agents * History of allergic reactions attributed to compounds of similar chemical or biologic composition to GW786034 (pazopanib) or other agents used in the study * \> +1 proteinuria (\< 30 mg/dL) on two consecutive dipstick or other urine assessments taken at least 1 week apart; NOTE: (in cases where questions arise related to disparate proteinuria measurements, the study principal investigator \[PI\] should be consulted for assistance in determining patient study eligibility) * Corrected QT interval (QTc) prolongation (defined as a QTc interval \>= 480 msecs) or other significant electrocardiogram (ECG) abnormalities (e.g. frequent ventricular ectopy, evidence of ongoing myocardial ischemia); NOTE: the principal investigator of the study should be contacted in the event of uncertainty related patient eligibility based upon ECG changes * Receiving cytochrome P450 (CYP) interactive concomitant medications; certain medications that act through the CYP450 system are specifically prohibited in patients receiving GW786034 (pazopanib) because in vitro data indicate that the agent has the potential to interact with the cytochrome P450 isoenzymes cytochrome P450, family 2, subfamily C, polypeptide 9 (CYP2C9) and cytochrome P450, family 3, subfamily A, polypeptide 4 (CYP3A4); certain other agents should be used with caution * Any condition (e.g., gastrointestinal tract disease resulting in an inability to take oral medication or a requirement for IV alimentation, prior surgical procedures affecting absorption, or active peptic ulcer disease) that impairs their ability to swallow and retain GSK786034 (pazopanib) * Any of the following conditions: * Serious or non-healing wound, ulcer, or bone fracture * History of abdominal fistula, gastrointestinal perforation, active diverticulitis, intra-abdominal abscess or gastrointestinal tract bleeding =\< 28 days of registration * Any history of cerebrovascular accident (CVA) =\< 6 months * Current use of therapeutic warfarin; Note: low molecular weight heparin and prophylactic low-dose warfarin (INR \< 1.2 X ULN) are permitted; prothrombin time (PT)/partial thromboplastin time (PTT) must meet the inclusion criteria * History of myocardial infarction, cardiac arrhythmia, admission for unstable angina, cardiac angioplasty or stenting within the last 12 weeks * History of venous thrombosis in last 12 weeks * Class III or IV heart failure as defined by the New York Heart Association (NYHA) functional classification system; NOTE: a patient who has a history of class II heart failure and is asymptomatic on treatment may be considered eligible * History of bleeding disorder, including patients afflicted with hemophilia, disseminated intravascular coagulation, or any other abnormality of coagulation potentially predisposing patients to bleeding * Poorly controlled depression or anxiety disorder, or recent (=\< 6 months) suicidal ideation * Known active and/or untreated brain metastases and/or brain metastases requiring ongoing therapy (e.g. corticosteroids); NOTE: (because of the poor prognosis often associated with brain metastases and because of the potential risk of bleeding in active brain metastases associated with multi-targeted tyrosine kinase inhibitor therapy, patients with active and/or untreated brain metastases and/or those with brain metastases requiring ongoing therapy - e.g. corticosteroids - are excluded from trial enrollment; enrollment will, however, be permitted in cases of patients with longstanding treated and inactive brain metastases not requiring ongoing therapy, providing that stability of brain metastases has been demonstrated for a period of 3 months or greater as assessed by intracranial imaging - and providing that there is no indication of increased vascularity of the treated metastases by magnetic resonance imaging (MRI) imaging conducted =\< 14 days prior to registration; when questions arise related to these criteria, the PI of the trial, Dr. Keith Bible, should be contacted for assistance on eligibility) * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection or psychiatric illness/social situations that would or might reasonably be expected to limit compliance with study requirements * Pregnant women; NOTE: (breastfeeding should be discontinued if the mother is treated with GW786034/pazopanib) * Human immunodeficiency virus (HIV)-positive patients on combination antiretroviral therapy; NOTE: (appropriate studies will be undertaken in patients receiving combination antiretroviral therapy when indicated) * Receiving any medications or substances known to affect or with the potential to affect the activity or pharmacokinetics of GW786034 (pazopanib); NOTE: the eligibility of patients will be determined following review of their case by the principal investigator; efforts should be made to switch patients who are taking enzyme-inducing anticonvulsant agents to other medications * Receiving any concomitant medications that are associated with a risk of QTc prolongation and/or Torsades de Pointes; NOTE: these medications should be discontinued or replaced with drugs that do not carry these risks, if possible

Design outcomes

Primary

MeasureTime frameDescription
Overall Response Rate (in Cohorts 1-3)Up to 3 yearsThe tumor response rate is defined as the percentage of eligible patients who fulfill RECIST 1.0 for a complete or partial response at two consecutive assessments at least 8 weeks apart for patients in Cohorts 1-3. Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>= 30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR.
Confirmed Tumor Response (in the Differentiated Thyroid Cancer Expansion Cohort)Up to 3 yearsThe confirmed tumor response rate is defined as the percentage of eligible patients who fulfill RECIST 1.0 for a complete or partial response at two consecutive assessments at least 8 weeks apart for patients with differentiated thyroid cancer who are thyroglobulin antibody negative. Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>= 30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR.

Secondary

MeasureTime frameDescription
Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to TreatmentUp to 3 yearsToxicity (defined as grade 3+ adverse events deemed possibly, probably, or definitely related to treatment) will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0. The percentage of patients with grade 3+ adverse events deemed possibly, probably, or definitely related to treatment are reported for patients in Cohorts 1-3.
Progression-Free Survival at 6 Months (Cohorts 1 and 2 Only)Time from registration to the date of progression or last follow-up, whichever comes first, assessed up to 6 monthsProgression free survival at 6 months (PFS6) is defined as the proportion of patients alive and without progression at 6 months. Progression is defined according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.0.
Progression-Free Survival at 3 Months (Cohort 3 Only)Time from registration to the date of progression or last follow-up, whichever comes first, assessed up to 3 monthsProgression free survival at 3 months (PFS6) is defined as the proportion of patients alive and without progression at 3 months. Progression is defined according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.0.

Other

MeasureTime frameDescription
Change in Blood Markers for AngiogenesisBaseline to up to 3 yearsBlood markers for angiogenesis including levels of free VEGF, free GW786034, and GW786034/VEGF complexes will be evaluated before and during therapy. Changes in these levels will largely be explored in a graphical manner as well as exploring any potential relationships between these levels and clinical outcome such as response or progression-free rate and toxicity incidence.
Duration of ResponseTime from registration to the date the patient discontinues treatment, assessed up to 3 yearsDuration of response is defined for all evaluable patients who have achieved a confirmed response as the date at which the patient's objective status is first noted to be a CR or PR to the earliest date progression (PD) is documented. The distribution of duration of response will be estimated using the method of Kaplan-Meier. (CR: Disappearance of all evidence of disease, PR: Regression of measurable disease and no new sites, PD: Any new lesion or increase by \>= 50% of previously involved sites from nadir). Duration of response will be assessed.
Proportion of Patients With Differentiated Thyroid Cancer and Medullary Thyroid Cancer Who Have Not Failed Treatment at 6 Months (3 Months for Anaplastic Thyroid Cancer)Up to 6 monthsThe proportion of patients who have not failed treatment due to disease progression, adverse reactions, refusal for further participation, or who went on to alternate therapy at 6 months (3 months for anaplastic thyroid cancer patients) will be calculated and summarized independently within each of the patient groups. Assuming that the incidence of response is binomially distributed, 90% binomial confidence intervals will also be calculated.
Overall SurvivalTime from registration to date of last follow-up or death due to any cause, assessed up to 3 yearsOverall survival time is defined as the time from registration to death due to any cause. The median is estimated using the Kaplan-Meier estimator.\> Estimated using the method of Kaplan-Meier.
Time to Treatment FailureTime from registration to the date the patient discontinues treatment, assessed up to 3 yearsEstimated using the method of Kaplan-Meier.
Time to Subsequent TherapyUp to 3 yearsEstimated using the method of Kaplan-Meier.

Countries

Australia, China, Singapore, Taiwan, United States

Participant flow

Participants by arm

ArmCount
Cohort 1 (DTC)
Patients with differentiated thyroid cancer (DTC) receive 800 mg pazopanib hydrochloride PO QD on days 1-28. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.
37
Cohort 2 (MTC)
Patients with medullary thyroid cancer (MTC) receive 800 mg pazopanib hydrochloride PO QD on days 1-28. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
35
Cohort 3 (ATC)
Patients with anaplastic thyroid cancer (ATC) receive 800 mg pazopanib hydrochloride PO QD on days 1-28. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.
15
Expansion Cohort (DTC)
Patients with confirmed, differentiated thyroid cancer (DTC) who are thyroglobulin antibody negative receive 800 mg pazopanib hydrochloride PO QD on days 1-28. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.
60
Total147

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyWithdrawal by Subject2012

Baseline characteristics

CharacteristicCohort 1 (DTC)Cohort 2 (MTC)Cohort 3 (ATC)Expansion Cohort (DTC)Total
Age, Continuous63 years60 years66 years60 years61 years
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants1 Participants1 Participants3 Participants6 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
29 Participants33 Participants12 Participants57 Participants131 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
7 Participants1 Participants2 Participants0 Participants10 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
2 Participants7 Participants2 Participants17 Participants28 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants4 Participants4 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants1 Participants2 Participants3 Participants
Race (NIH/OMB)
White
35 Participants28 Participants12 Participants37 Participants112 Participants
Region of Enrollment
Australia
1 participants2 participants0 participants9 participants12 participants
Region of Enrollment
China
0 participants1 participants0 participants0 participants1 participants
Region of Enrollment
Singapore
1 participants3 participants2 participants3 participants9 participants
Region of Enrollment
Taiwan
0 participants3 participants0 participants10 participants13 participants
Region of Enrollment
United States
35 participants26 participants13 participants38 participants112 participants
Sex: Female, Male
Female
18 Participants7 Participants10 Participants27 Participants62 Participants
Sex: Female, Male
Male
19 Participants28 Participants5 Participants33 Participants85 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
3 / 380 / 351 / 154 / 61
other
Total, other adverse events
38 / 3835 / 3515 / 1559 / 61
serious
Total, serious adverse events
21 / 3818 / 359 / 1531 / 61

Outcome results

Primary

Confirmed Tumor Response (in the Differentiated Thyroid Cancer Expansion Cohort)

The confirmed tumor response rate is defined as the percentage of eligible patients who fulfill RECIST 1.0 for a complete or partial response at two consecutive assessments at least 8 weeks apart for patients with differentiated thyroid cancer who are thyroglobulin antibody negative. Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>= 30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR.

Time frame: Up to 3 years

Population: All patients that registered to the Differential Thyroid Expansion cohort and were evaluable for response assessment were included in this analysis.

ArmMeasureValue (NUMBER)
Expansion Cohort (DTC)Confirmed Tumor Response (in the Differentiated Thyroid Cancer Expansion Cohort)37 percentage of participants
Primary

Overall Response Rate (in Cohorts 1-3)

The tumor response rate is defined as the percentage of eligible patients who fulfill RECIST 1.0 for a complete or partial response at two consecutive assessments at least 8 weeks apart for patients in Cohorts 1-3. Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.0) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>= 30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR.

Time frame: Up to 3 years

Population: All patients in Cohort 1, Cohort 2, and Cohort 3 that received treatment and were eligible for response assessment were included in this analysis.

ArmMeasureValue (NUMBER)
Cohort 1 (DTC)Overall Response Rate (in Cohorts 1-3)49 percentage of participants
Cohort 2 (MTC)Overall Response Rate (in Cohorts 1-3)14 percentage of participants
Cohort 3 (ATC)Overall Response Rate (in Cohorts 1-3)0 percentage of participants
Secondary

Progression-Free Survival at 3 Months (Cohort 3 Only)

Progression free survival at 3 months (PFS6) is defined as the proportion of patients alive and without progression at 3 months. Progression is defined according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.0.

Time frame: Time from registration to the date of progression or last follow-up, whichever comes first, assessed up to 3 months

Population: All patients from Cohort 3 that were treated and evaluable for response were included in this analysis.

ArmMeasureValue (NUMBER)
Cohort 3 (ATC)Progression-Free Survival at 3 Months (Cohort 3 Only).267 proportion of participants
Secondary

Progression-Free Survival at 6 Months (Cohorts 1 and 2 Only)

Progression free survival at 6 months (PFS6) is defined as the proportion of patients alive and without progression at 6 months. Progression is defined according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.0.

Time frame: Time from registration to the date of progression or last follow-up, whichever comes first, assessed up to 6 months

Population: All patients in Cohort 1 and Cohort 2 that received treatment and were eligible for response assessment were included in this analysis.

ArmMeasureValue (NUMBER)
Cohort 1 (DTC)Progression-Free Survival at 6 Months (Cohorts 1 and 2 Only).71 proportion of participants
Cohort 2 (MTC)Progression-Free Survival at 6 Months (Cohorts 1 and 2 Only).686 proportion of participants
Secondary

Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to Treatment

Toxicity (defined as grade 3+ adverse events deemed possibly, probably, or definitely related to treatment) will be assessed by the National Cancer Institute Common Terminology Criteria for Adverse Events version 3.0. The percentage of patients with grade 3+ adverse events deemed possibly, probably, or definitely related to treatment are reported for patients in Cohorts 1-3.

Time frame: Up to 3 years

Population: All patients that received protocol treatment and were assessed for adverse events are included in this analysis.

ArmMeasureValue (NUMBER)
Cohort 1 (DTC)Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to Treatment40 percentage of participants
Cohort 2 (MTC)Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to Treatment46 percentage of participants
Cohort 3 (ATC)Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to Treatment53 percentage of participants
Expansion Cohort (DTC)Toxicity as Measured by the Percentage of Patients Reporting a Grade 3+ Adverse Event Deemed Possibly, Probably, or Definitely Related to Treatment53 percentage of participants
Other Pre-specified

Change in Blood Markers for Angiogenesis

Blood markers for angiogenesis including levels of free VEGF, free GW786034, and GW786034/VEGF complexes will be evaluated before and during therapy. Changes in these levels will largely be explored in a graphical manner as well as exploring any potential relationships between these levels and clinical outcome such as response or progression-free rate and toxicity incidence.

Time frame: Baseline to up to 3 years

Other Pre-specified

Duration of Response

Duration of response is defined for all evaluable patients who have achieved a confirmed response as the date at which the patient's objective status is first noted to be a CR or PR to the earliest date progression (PD) is documented. The distribution of duration of response will be estimated using the method of Kaplan-Meier. (CR: Disappearance of all evidence of disease, PR: Regression of measurable disease and no new sites, PD: Any new lesion or increase by \>= 50% of previously involved sites from nadir). Duration of response will be assessed.

Time frame: Time from registration to the date the patient discontinues treatment, assessed up to 3 years

Other Pre-specified

Overall Survival

Overall survival time is defined as the time from registration to death due to any cause. The median is estimated using the Kaplan-Meier estimator.\> Estimated using the method of Kaplan-Meier.

Time frame: Time from registration to date of last follow-up or death due to any cause, assessed up to 3 years

Other Pre-specified

Proportion of Patients With Differentiated Thyroid Cancer and Medullary Thyroid Cancer Who Have Not Failed Treatment at 6 Months (3 Months for Anaplastic Thyroid Cancer)

The proportion of patients who have not failed treatment due to disease progression, adverse reactions, refusal for further participation, or who went on to alternate therapy at 6 months (3 months for anaplastic thyroid cancer patients) will be calculated and summarized independently within each of the patient groups. Assuming that the incidence of response is binomially distributed, 90% binomial confidence intervals will also be calculated.

Time frame: Up to 6 months

Other Pre-specified

Time to Subsequent Therapy

Estimated using the method of Kaplan-Meier.

Time frame: Up to 3 years

Other Pre-specified

Time to Treatment Failure

Estimated using the method of Kaplan-Meier.

Time frame: Time from registration to the date the patient discontinues treatment, assessed up to 3 years

Source: ClinicalTrials.gov · Data processed: Mar 30, 2026