FALSE POSITIVE VOCAL CORD UPTAKE ON FLOURODEOXYGLUCOSE-POSITRON EMISSION TOMOGRAPHY (FDG-PET) DUE TO TEFLON INJECTION

Hassan Almubarak, Owais Kotbi, Fahad Al-Lhedan, Wanzhen Zeng, Awad Saeed Al-Samghan

Abstract


Objectives:  To present a case of intense right vocal cord uptake on FDG-PET secondary to a Teflon injection in a patient with history of cervical sympathectomy and right vocal cord paralysis and to review common and uncommon causes of vocal cord uptake on FDG-PET.

Case Report:  This is a case of a 78-year old female with intense right vocal cord uptake on FDG-PET secondary to a Teflon injection with history of cervical sympathectomy and right vocal cord paralysis. Intense increased FDG uptake by Teflon injection is a rare and unexpected finding. The mechanism of FDG uptake by Teflon injection will be discussed.  Review imaging findings as well as common and uncommon causes of vocal cord uptake on FDG-PET.  Conclusion: Medialization of the paralyzed vocal cord with Teflon can induce a granulomatous reaction that causes accumulation of FDG within the abnormal cord, mimicking a metastasis or recurrent neoplasm.


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References


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