title: Brain-Only Metastases Seen on FDG PET as First Relapse of Papillary Thyroid Carcinoma Two Years Post-Thyroidectomy.
abstract: We report a case of a 60-year-old man diagnosed with papillary thyroid cancer who had a relapse seen only in the brain at FDG PET on standard images. Total thyroidectomy was performed in July 2013 after initial diagnosis. Patient received I ablation in December 2013, followed by external beam radiotherapy to the neck. In September 2015, the patient presented with neurological symptoms. Brain MRI showed multiple brain metastases later confirmed on histopathology. An FDG PET/CT scan was performed to evaluate the whole body in November 2015. Multiple hypermetabolic lesions were identified in the brain with no other lesion up to mid thighs.
authors.affiliation: From the Departments of *Medical Imaging and †Radiation Oncology, King Fahad Hospital, King Saud Bin Abdulaziz University of Health Sciences and King Abdullah International Medical Research Centre, King A Aziz Medical City, Riyadh, Kingdom of Saudi Arabia.
authors.forename: Sleiman Y
authors.initials: SY
authors.lastname: Naddaf
authors.forename: Ghulam Mustafa Shah
authors.initials: GM
authors.lastname: Syed
authors.forename: Abdulrahman
authors.initials: A
authors.lastname: Hadb
authors.forename: Saif
authors.initials: S
authors.lastname: Al-Thaqfi
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary; D002277:Carcinoma / Q000473:pathology*; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging* / Q000556:secondary; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D000072078:Positron Emission Tomography Computed Tomography; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000473:pathology*; D013965:Thyroidectomy
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18