Relationship between serum thyroglobulin and ¹⁸FDG‐PET/CT in ¹³¹I‐negative differentiated thyroid carcinomas

Abstract

Although (18) FDG-PET/CT scans are more likely to be positive with pretest Tg levels ≥4.6 ng/mL, 11% of patients with DTC with a lower serum Tg level will still have a positive scan. Our findings are in contrast with the American Thyroid Association (ATA) guidelines, which only recommend to perform (18) FDG-PET/CT in patients with Tg levels >10 ng/mL.