Restor. I-131 Upt. + Selpercatinib in RET F-P RAI-R TC

Selpercatinib Oral, twice daily during initial treatment period (28 Days). A second course of selpercatinib if the participant is demonstrating clinical benefit to the initial course selpercatinib and deemed clinically appropriate by the treating investigator

I-131 NaI, oral, is a standard treatment for all types of follicular-derived thyroid cancers, except anaplastic thyroid cancer

"RhTSH injection, dosage per protocol, timing per protocol during the initial treatment period per standard of care.~Participants may receive a second course of rhTSH if the participant is demonstrating clinical benefit to the initial course rhTSH and deemed clinically appropriate by the treating investigator."