Radiologic appearance of chronic parapharyngeal Teflon granuloma.
Although Teflon has been used for almost 5 decades to provide tissue augmentation in various surgical indications, including head and neck surgery, its use has significantly declined in the last 2 decades, primarily because of its implication in granuloma formation. Teflon granulomas have been shown to cause false positives on positron emission tomography imaging and have been reported to have a characteristic magnetic resonance imaging (MRI) appearance. We report a patient with a large chronic Teflon granuloma of the parapharyngeal space that caused significant bony erosion of the atlas vertebra. The lesion's MRI signal characteristics were indistinguishable from those of surrounding tissues, while it showed characteristic hyperdensity on computed tomography due to the presence of fluorine atoms within Teflon. As MRI may supersede or replace computed tomography for a number of indications, and as Teflon has been used in large numbers of patients whose records may not always be available, knowledge of these findings has clinical relevance.
Hacein-Bey
Lotfi
L
Department of Radiology, Loyola University Medical Center, Maywood, IL, USA. lhaceinbey@yahoo.com
Conneely
Mark F
MF
Hijaz
Tarek A
TA
Leonetti
John P
JP
D015745:Granuloma, Foreign-Body / Q000139:chemically induced / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010608:Pharyngeal Diseases / Q000139:chemically induced / Q000473:pathology*; D011138:Polytetrafluoroethylene / Q000009:adverse effects*; D014057:Tomography, X-Ray Computed
D011138:Polytetrafluoroethylene