Incidental Thyroid Lesions Detected on 18 F-Fluorodeoxyglucose Positron Emission Tomography / CT in Patients with Non-Thyroidal Cancer : Clinical Implications and the Value of Ultrasound 1 비갑상선암 환자에서 시행한 18 F-Fluorodeoxyglucose Positron Emission Tomography

Incidental thyroid lesions (ITLs) detected on 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) are defined as incidentally found abnormalities in the thyroid gland on 18F-FDG PET/CT in patients with non-thyroidal disease (1). 18F-FDG PET/CT is increasingly used to evaluate localization, stage of primary index tumors, and follow-up for primary and metastatic lesions in patients with various kinds of malignancies (2). The current widespread use of 18F-FDG PET/CT in patients with non-thyroidal malignancies has resulted in an increase in detection of ITLs. The strategy for managing these lesions is important for predicting patient prognosis and cost-effectiveness. Ultrasound (US) and subsequent US-guided fine needle aspiration (US-FNA) are widely recommended for evaluating ITLs Original Article