How can a thyroid nodule grow in a gland bed of post total thyroidectomy?

Radioactive iodine ? Did you ever have a radioactive iodine ablation to get rid of remnant tissue? Residual tissue in the thyroid bed could be remnant tissue or recurrence.
Residual Thyroid? If you had a nuclear thyroid scan and uptake in the thyroid bed was detected then the implication would be recurrent neoplasm if the original diagnosis was thyroid cancer. Rarely, there can be small residual deposits of thyroid tissue from embryological development that can enlarge after thyroidectomy and produce nodules. Good luck.

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