Table 2.

Follow-up strategy based on risk groups (adapted from [4]).

	Initial estimate of risk of recurrence first 2 years of followup incomplete response
Suppressed Tg	Low risk Q 6 months	Intermediate risk Q 6 months	High risk Q 6 months
Stimulated Tg	Not required	<10 ng/mL	>10 ng/mL
Neck ultrasound	Q year × 2	Q year × 2	Q year × 2
Diagnostic RAI WBS	Not required	1-2 years	1-2 years
Cross-sectional imaging (MRI, CT)	Not required	Not required	If Tg elevated or high clinical suspicion
Secondary risk stratification response to therapy assessment
Ongoing followup	Yearly physical examination, yearly suppressed Tg	Yearly physical examination, yearly suppressed Tg, stimulated Tg to document undetectable Tg on suppression, continued observation/assessment of indeterminate structural abnormalities for at least another 2-3 years	Consider additional cross-sectional imaging, possibly FDG PET scan and the need for additional therapy