RecruitingPhase 2Drug trialLenvatinib 24 mg/Day Versus 10 mg/Day to Treat Symptomatic or Progressive Radioactive Iodine Resistant (RAIR) Differentiated Thyroid Cancer (DTC)This open-label, randomized phase II trial evaluates the dose delivery, tolerance, and efficacy of two dosing regimens of lenvatinib among patients with radioactive iodine resistant (RAIR) differentiated thyroid cancer (DTC).