
Because of its relative rarity and favorable outcome, it has not been feasible to assess medical interventions for thyroid cancer using randomized prospective trials. The approach to diagnosis and treatment relies to a great extent on information derived from retrospective studies...

Because of its relative rarity and favorable outcome, it has not been feasible to assess medical interventions for thyroid cancer using randomized prospective trials. The approach to diagnosis and treatment relies to a great extent on information derived from retrospective studies...