TG and thyroid cancer: The thyroid gland synthesizes thyroid hormones by absorbing iodine from the bloodstream, where these hormones play a crucial role in regulating cellular metabolism, energy production, and overall metabolic rate. Thyroid cancer cells often exhibit poor iodine uptake due to functional alterations; however, iodine remains a critical treatment option and follow-up tool, particularly in the context of radioactive iodine therapy, which is used to target and destroy residual cancerous tissue.