What is the life expectancy of a person with thyroid cancer?

Usually very good: I can't give one definitive answer as it will depend on the specific type of thyroid cancer and the stage at diagnosis. There are at least 4 different types: Papillary, Follicular, Medullary and Analplastic. The good news is that the most common types of thyroid cancer, (Papillary and follicular), especially at stages I or II have excellent prognosis with treatment and are very rarely fatal.