Teflon-Induced Granuloma: A False-Positive Finding with PET Resolved with Combined PET and CT

may have recurrent laryngeal nerve injury; until recently, Teflon injection was commonly used for vocal cord medializa-tion. We present a case of a patient who underwent thy-roidectomy who had significantly increased and unilateral 18F-fluorodeoxyglucose uptake in the neck, which was found to be localized to the left vocal cord by use of combined positron emission tomography (PET) and CT, presumably because of a Teflon-induced granuloma. Knowledge of this potential source of false-positive PET interpretation because of its inability to precisely localize neoplastic lesions, and the use of combined PET and CT imaging, may allow precise diagnosis and prevention of unnecessary interventions. Positron emission tomography (PET) with 18F-flu-orodeoxyglucose (FDG) is a powerful tool in the diagnosis, staging, and therapeutic monitoring of ex