title: Metastatic thyroid cancer occurring as an unknown primary lesion: the role of F-18 FDG positron emission tomography.
abstract: Thyroid cancer can appear as metastatic disease of an unknown primary origin, and fluorine-18 fluorodeoxyglucose (F-18 FDG) positron emission tomographic (PET) studies are helpful in the workup evaluation of these patients. The authors describe two patients who had metastatic disease from an unknown primary lesion. F-18 FDG PET studies played an important role in localizing the primary malignant site in the thyroid gland. The utility of F-18 FDG imaging in decreasing the number of procedures, cost, and inconvenience to patients is shown clearly in both cases.
authors.affiliation: Nuclear Medicine Section, Department of Radiology, St. Vincent's Catholic Medical Centers of New York, New York Medical College, 153 West 11 Street, New York, NY 10011,USA.
authors.forename: F
authors.initials: F
authors.lastname: Dede
authors.forename: N D
authors.initials: ND
authors.lastname: Ajoedi
authors.forename: S M
authors.initials: SM
authors.lastname: Ansari
authors.forename: S
authors.initials: S
authors.lastname: Jana
authors.forename: S I
authors.initials: SI
authors.lastname: Heiba
authors.forename: H M
authors.initials: HM
authors.lastname: Abdel-Dayem
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D005260:Female; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D008297:Male; D008875:Middle Aged; D009382:Neoplasms, Unknown Primary / Q000000981:diagnostic imaging*; D019275:Radiopharmaceuticals; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014055:Tomography, Emission-Computed; D014915:Whole-Body Counting
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18