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About
This is a multicenter, randomized, double-blind study being conducted as a postmarketing requirement to the US Food and Drug Administration (FDA) to evaluate whether there is a lower starting dosage of lenvatinib 24 mg once daily (QD) that provides comparable efficacy but has a better safety profile in participants with radioiodine-refractory differentiated thyroid cancer RR-DTC with radiographic evidence of disease progression within the prior 12 months.
Full description
This study consists of 2 phases, the Prerandomization Phase and the Randomization Phase. The Prerandomization Phase will last no longer than 28 days and will include a Screening Period to establish protocol eligibility and a Baseline Period to confirm eligibility and establish disease characteristics prior to randomization and treatment.
The Randomization Phase will consist of a Treatment Period and a Follow-up Period. It will begin at the time of randomization of the first participant and will consist of 28-day blinded study treatment cycles. The data cutoff for the primary analysis will occur at the end of the Randomization Phase, which is defined as when the last participant enrolled completes the Week 24 tumor assessments or discontinues study treatment if before Week 24.
Participants on treatment at the time of data cutoff for the primary analysis will remain on blinded investigational product until the primary analysis has been completed, after which they will transition to commercial lenvatinib outside the study. The last participant's last assessment (Off-treatment visit) will be the End of Study.
Participants will be randomly assigned to treatment with 1 of 2 blinded starting dosages of lenvatinib in a 1:1 ratio to receive lenvatinib 18 mg or 24 mg orally once daily (QD). Dose reductions will occur in succession based on the previous dose level (24, 20, 14, 10, and 8 mg QD, or 18, 14, 10, 8, and 4 mg QD, respectively). Once the dose has been reduced, it may not be increased at a later date.
Enrollment
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Inclusion criteria
Participants must have histologically or cytologically confirmed diagnosis of one of the following differentiated thyroid cancer (DTC) subtypes:
Papillary thyroid cancer (PTC)
Follicular thyroid cancer (FTC)
Measurable disease meeting the following criteria and confirmed by central radiographic review:
Participants must show evidence of disease progression within 12 months (an additional month will be allowed to accommodate actual dates of performance of screening scans, that is, within less than or equal to <=13 months) prior to signing informed consent, according to RECIST 1.1 assessed and confirmed by central radiographic review of CT and/or MRI scans.
Participants must be Iodine-131 refractory/resistant as defined by at least one of the following:
Participants with known brain metastases who have completed whole brain radiotherapy, stereotactic radiosurgery or complete surgical resection, will be eligible if they have remained clinically stable, asymptomatic, and off steroids for one month.
Participants must be receiving thyroxine suppression therapy and thyroid stimulating hormone (TSH) should not be elevated (TSH should be <=5.50 micro-international units per liter [mcIU/ML]). When tolerated by the participant, thyroxine dose should be changed to achieve TSH suppression (TSH <0.50 mcIU/ML) and this dose may be changed concurrently upon starting study drug treatment.
All chemotherapy or radiation-related toxicities must have resolved to Grade <2 severity per Common Terminology Criteria for Adverse Events (CTCAE v4.03), except alopecia and infertility.
Participants must have an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0, 1, or 2.
Adequately controlled blood pressure (BP) with or without antihypertensive medications, defined as BP ≤150/90 mmHg at Screening and no change in antihypertensive medications within 1 week prior to Cycle 1/Day 1.
Adequate renal function defined as calculated creatinine clearance >=30 mL/min per the Cockcroft and Gault formula.
Adequate bone marrow function:
Adequate blood coagulation function as evidenced by an International Normalized Ratio (INR) <=1.5.
Adequate liver function:
Males or females age >=18 years at the time of informed consent.
Females must not be lactating or pregnant at Screening or Baseline (as documented by a negative beta-human chorionic gonadotropin [B-hCG] test with a minimum sensitivity of 25 IU/L or equivalent units of B-hCG. A separate baseline assessment is required if a negative screening pregnancy test was obtained more than 72 hours before the first dose of study drug.
All females will be considered to be of childbearing potential unless they are postmenopausal (amenorrheic for at least 12 consecutive months, in the appropriate age group and without other known or suspected cause) or have been sterilized surgically (ie, bilateral tubal ligation, total hysterectomy or bilateral oophorectomy, all with surgery at least 1 month before dosing).
Females of childbearing potential should avoid becoming pregnant and use highly effective contraception while on treatment with lenvatinib and for at least 1 month after finishing treatment. Females of childbearing potential must not have had unprotected sexual intercourse within 30 days before study entry and must agree to use a highly effective method of contraception (example, total abstinence, an intrauterine device, a contraceptive implant, an oral contraceptive, or have a vasectomized partner with confirmed azoospermia) throughout the entire study period and for 30 days after study drug discontinuation. Females who are using hormonal contraceptives must have been on a stable dose of the same hormonal contraceptive product for at least 4 weeks before dosing and must continue to use the same contraceptive during the study and for 30 days after study drug discontinuation. Women using oral hormonal contraceptives should add a barrier method.
Participants must voluntarily agree to provide written informed consent.
Participants must be willing and able to comply with all aspects of the protocol.
Exclusion criteria
Primary purpose
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241 participants in 2 patient groups
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Data sourced from clinicaltrials.gov
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