Evaluation of Residual Thyroid Tissue with Tc-99m MIBI in Differential Thyroid Carcinoma Patients: A Case Report

Tc-99m pertechnetate thyroid scintigraphy is used in the routine for the evaluation of residual tissue after total thyroidectomy operations in differentiating thyroid carcinoma. Tc-99m methoxy isobutyl isonitrile (Tc99m MIBI) was first developed as a myocardial perfusion agent and is also used for tumor imaging. Tc-99m MIBI is taken up by the functioning thyroid tissue and washed-out fast. We present a case of differentiated thyroid carcinoma where uptake out the thyroid bed was not detectable by Tc-99m pertechnetate thyroid scintigraphy but with Tc-99m MIBI scintigraphy in the postoperative period