[The correlation between endogenous TgAb and experimental Tg values in patients with differentiated thyroid carcinomas].

Objective: To determine the interference of antithyroglobulin (TgAb) on the measurement of serum thyroglobulin (Tg) in patients with differentiated thyroid carcinomas (DTC).

Methods: The Tg positive serum and TgAb positive serum were taken from the patients with total thyroidectomy and thyroid remnant ablation by radioiodine. The Tg positive serum contained high level of Tg (>10 microg/L) and nondetectable TgAb.