Detection of Recurrence in Retromolar Trigone using "Puffed Cheek" F-18 FDG PET-CT Scan.

Fluorine-18 Fluorodeoxyglucose positron emission tomography computed tomography (18FDG PET-CT) is routinely used for post treatment monitoring of oral cavity cancers. In addition to physiological uptake of 18FDG, apposition of anatomical structures poses a big challenge in accurate localization of pathology in oral cavity that is further complicated by surgery and/or radiotherapy related distortion. Case of recurrent Squamous Cell Carcinoma (SCC) of tongue is being presentedin a patient who underwent 18FDG PET-CT for post treatment monitoring. Simple 'Puffed Cheek' maneuver helped in accurately localizing tumour recurrence site within the retro-molar trigone.