Figure 4

Oropharyngeal cancer, stage T4b. A: axial, non-enhanced T1-weighted, B, C: axial post-contrast T1-weighted MR images with fat suppression show tumour involving the lateral wall of the oropharynx on the left side, widely extending towards the retromolar trigone of mandibule (C image, long arrow), destructing the mandibular cortex, involving the marrow space (C image, short arrow). Note the extensive tumor involvement (long arrows) of the retroharyngeal- (RPhS), carotid-, masticator- (MS), as well as the parotid space (PS).