Coronal T1-weighted postcontrast MR image in a 71-year-old man, 11 years after radiation therapy, with a contrast enhancing polyp (arrow) with less enhancing.

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Presentation transcript:

Coronal T1-weighted postcontrast MR image in a 71-year-old man, 11 years after radiation therapy, with a contrast enhancing polyp (arrow) with less enhancing stellate areas centrally, arising at the junction of the sphenoid sinus and roof of the nasopharynx... Coronal T1-weighted postcontrast MR image in a 71-year-old man, 11 years after radiation therapy, with a contrast enhancing polyp (arrow) with less enhancing stellate areas centrally, arising at the junction of the sphenoid sinus and roof of the nasopharynx where there is an osteoradionecrotic bony defect. A.D. King et al. AJNR Am J Neuroradiol 2008;29:1209-1214 ©2008 by American Society of Neuroradiology