title: Thyroid carcinoma in solitary hot thyroid lesions on Tc-99m sodium pertechnetate scans.
abstract: Sixteen patients with nonsuppressible solitary hot thyroid lesions (SHTL) identified on T3 suppression images using Tc-99m sodium pertechnetate were studied over a period of 5 years. Of the 16 patients, 7 (44%) had papillary adenocarcinoma (PAC) and 9 (56%) had follicular adenoma (FA). Of the 7 patients with PAC, 3 were toxic and 4 nontoxic. Of the 9 patients with FA, 2 were toxic and 7 nontoxic. The Tl-201 chloride thyroid scans were useful in locating SHTL and revealing extranodular thyroid tissue. The echography was sensitive to visualization of the nodule structures. However, there were no significant differences between the clinical findings, radionuclide images, and echograms between for PAC and FA. All patients with PAC were treated by partial thyroidectomy and there were neither regional nor distant metastasis in any of them. In conclusion, our study provided the following extremely interesting result: SHTL in the present series have a higher incidence of malignancy than previously reported autonomously functioning thyroid lesions (AFTL). Histological examination is necessary for the diagnosis and management of SHTL and surgical treatment should be considered.
authors.affiliation: Department of Nuclear Medicine, Kobe City General Hospital, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ikekubo
authors.forename: M
authors.initials: M
authors.lastname: Hino
authors.forename: H
authors.initials: H
authors.lastname: Ito
authors.forename: M
authors.initials: M
authors.lastname: Otani
authors.forename: H
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Saiki
authors.forename: K
authors.initials: K
authors.lastname: Ui
authors.forename: Y
authors.initials: Y
authors.lastname: Habuchi
authors.forename: T
authors.initials: T
authors.lastname: Ishihara
authors.forename: T
authors.initials: T
authors.lastname: Mori
mesh_terms: D000231:Adenocarcinoma, Papillary / Q000000981:diagnostic imaging*; D000236:Adenoma / Q000000981:diagnostic imaging*; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011877:Radionuclide Imaging; D013670:Sodium Pertechnetate Tc 99m; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*
chemical_list: D013670:Sodium Pertechnetate Tc 99m