How would you follow patients with differentiated thyroid cancer that no longer picks up iodine after thyroidectomy and RAI, and have thyroglobulin antibodies?

The presence of antibodies makes measuring the thyroglobulin level essentailly inaccurate. PET imaging may have a role though clear data on its utlity is limited (and it's expensive). Physical exams and Ultrasonography is the best way of monitoring the disease state from a surveillance point. For sy...