This is an observational cohort study that will enroll patients with DTC metastatic to the lungs who will receive oncogene-specific targeted therapy as part of routine clinical care or a separate therapeutic clinical trial. After approximately 4 weeks of therapy, patients will have a whole body scan to determine the change in RAI-avidity of their tumor from baseline. Subsequent therapy will be at the discretion of the treating physician or according to the therapeutic trial on which the patient is enrolled.
Papillary thyroid cancer (PTC) is a common type of differentiated thyroid cancer (DTC) in children and represents the second most common cancer in adolescent females. Recently targeted drugs that block many of the genetic drivers of DTC have become available. While Investigators know that these drugs shrink DTC tumors in many cases, the impact on radioactive iodine (RAI) avidity has not been systematically studied.