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Fig. 10 | Insights into Imaging

Fig. 10

From: FDG-PET/CT pitfalls in oncological head and neck imaging

Fig. 10

a Axial PET/CT image shows intense FDG uptake in the right root of the tongue and floor of the mouth (asterisk) in a patient with recent surgical resection of recurrent SCC of the left hemitongue. b Corresponding axial non-contrast CT image confirms post-surgical architectural distortion without an obvious underlying mass lesion (asterisk) on the right. Corresponding axial T2W (c) and contrast-enhanced T1W (d) images reveal a linear band of low signal intensity scar tissue on the left (arrows). No tumour is seen on the right (asterisks). Muscle architecture in the right floor of the mouth appears normal on T2 but there is some diffuse muscular enhancement on the corresponding T1W image. Compensatory hyperactivity and post-surgical inflammatory findings due to contralateral scarring were considered as the cause of this unusually high FDG uptake. Follow-up of 2 years confirmed absence of recurrence

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