Figure 5

Oropharyngeal cancer, arising from the base of the tongue on the right side, stage T4b A, B, C: axial post-contrast T1-weighted MR images with fat suppression. The estimated tumour stage by clinical examination was T2, but note the tumor extension in the deep cervical structures, trough the parapharyngeal- (PPhS), carotid- (CS), retropharyngeal-(RPhS) and posterior neck space (PNS, long arrows) into the scala posterior, involving the apex of petrous part of temporal bone and pontocerebellar region (arrowheads).