Ectopic functioning thyroid tissue in the thyroglossal duct detected by radionuclide imaging.
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.
Rao
P Nageswara
PN
Department of Nuclear Medicine, Kasturba Medical College & Hospital, Manipal, India. drpesala@yahoo.com
Pandit
Nandini
N
Kumar
Rajesh
R
Upadhya
Indira V
IV
Vidya Sagar
M S
MS
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*