Fig 2.

Axial T1-weighted postcontrast MR imaging of a 48-year-old man with NPC (arrow). A, Note a small moderately contrast-enhancing NPC in the right pharyngeal recess on MR imaging at presentation (grade 4), which was not detected by endoscopy or endoscopic biopsy or at repeat biopsy targeted to the site of the MR imaging abnormality. B, Persistent NPC on MR imaging is seen at 31 months, but without a tumor on endoscopic examination. A further biopsy was declined. C, An increase in the size of the NPC on MR imaging at 43 months when the tumor was confirmed by endoscopy and biopsy.