... T3 Tumor involves bony structures and/ or paranasal sinuses T2b N1 M0 Chapter 084. Head and Neck Cancer (Part 4) Table 84-2 Definition of TNM–Nasopharynx Primary Tumor (T) Stage ... lymph node spread from nasopharynx cancer, particularly of the undifferentiated type, are different from those of other head and neck mucosal cancers and justify the use of a different ... extension and/ or involvement of cranial nerves, infratemporal fossa, hypopharynx, orbit, or masticator space T2a N2 M0 Regional Lymph Nodes (N) T2b N2 M0 The distribution and the...