What are the stages?
Healthcare providers can use a staging system to understand how far thyroid cancer spreads. Generally, when cancer cells in your thyroid reach the last stage, they also spread to your nearby structures and lymph nodes first.
Then, the cancer might as well spread to distant lymph nodes, organs, and even bones. Thyroid cancer stages usually range from 1 to 4. In other words, the higher the number, the more serious the cancer.