title: Ectopic functioning thyroid tissue in the thyroglossal duct detected by radionuclide imaging.
abstract: A 49-year-old man with a clinical diagnosis of Graves' disease was referred for a thyroid scan and radioactive ablation of the gland. Tc-99m pertechnetate scan revealed a diffuse toxic goiter and radiotracer concentration in the thyroglossal duct. He was given 10 mCi of I-131 orally as treatment of thyrotoxicosis. Repeat scanning of the anterior neck 2 days later revealed concentration of radioiodine in the diffusely enlarged gland and the thyroglossal duct as found on the Tc-99m pertechnetate scan, thus confirming the presence of functioning thyroid tissue in the thyroglossal duct.
authors.affiliation: Department of Nuclear Medicine, Kasturba Medical College & Hospital, Manipal, India. drpesala@yahoo.com
authors.forename: P Nageswara
authors.initials: PN
authors.lastname: Rao
authors.forename: Nandini
authors.initials: N
authors.lastname: Pandit
authors.forename: Rajesh
authors.initials: R
authors.lastname: Kumar
authors.forename: Indira V
authors.initials: IV
authors.lastname: Upadhya
authors.forename: M S
authors.initials: MS
authors.lastname: Vidya Sagar
mesh_terms: D002828:Choristoma / Q000000981:diagnostic imaging*; D006111:Graves Disease / Q000150:complications* / Q000000981:diagnostic imaging / Q000532:radiotherapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D013961:Thyroid Gland / Q000002:abnormalities* / Q000000981:diagnostic imaging*