Fig. 7
From: FDG-PET/CT pitfalls in oncological head and neck imaging
a Axial PET/CT image depicts a focal nodular area of high FDG uptake at right level II (arrow) and at the left base of tongue (arrowhead). This patient was a follow-up case of SCCof the right floor of mouth. The nodular FDG uptake at right level II was considered suspicious for nodal recurrence whilst the focal FDG uptake at the left base of tongue was ascribed to probable lymphoid tissue uptake. b Corresponding axial CECT image detects no evidence of metastatic cervical adenopathy at right level II. The focal FDG uptake at right level II corresponds to partly calcified plaques in the right internal and external carotid arteries (arrow). Follow-up confirmed no lesion in the left base of the tongue