Is TI-RADS classification and Score Modified Method of thyroid nodules can be effective for evaluation of Thyroid Incidentalomas on FDG PET-CT imaging

Background: Flourodeoyglucose Positron Emission Tomography-Computed Tomography (FDG PET-CT) provides information about the anatomic structures and metabolic activities of tumors. The incidence of thyroid incidentaloma is rare on FDG PET-CT but it is related to malignancy when it is detected to be high. Although, patients who are already treated with another primary tumor can not be searched for second thyroid malignancy each time. The aim of this study was to evaluate TI RADS classification based on a score modified according to ultrasound (US) criteria for malignancy of thyroid nodules determined on FDG PET/CT imaging.