Fig. 13
From: FDG-PET/CT pitfalls in oncological head and neck imaging
a Coronal PET/CT image illustrates a focal nodular area of high FDG uptake within the left thyroid lobe (white arrow), which can reveal an underlying malignancy in 25–50 % of cases. Therefore, US FNAC is recommended. b Corresponding coronal CECT image shows a small hypodense nodule within the left thyroid lobe (white arrow), corresponding to the focus of high FDG uptake on PET/CT. Subsequent US FNAC of the left thyroid nodule and follow-up over a period of 2 years yielded benign thyroid nodule, thereby indicating that the PET/CT result was false-positive for malignancy