Evidence of dual ectopic thyroid tissue by thyroid scintigraphy in 6 cases in our study.
Thyroid scintigraphy was performed as described in Materials and Methods. Dual ectopic thyroid tissue were identified in 6 cases, who displayed 2 focal areas of abnormal radiotracer uptakes in the sublingual and subhyoid regions in thyroid scintigraphies. No evidence of radiotracer uptakes in the regions of orthotopic thyroid was found. Anterior and lateral views of patient 1 and patient 2 were presented. Anterior views of the other 4 patients were shown as well.