Tumor invasion | Invasion in pNPC and rNPC (case) | Invasion in pNPC alone (case) | Invasion in rNPC alone (case) | No invasion in pNPC and rNPC (case) | P-value |
---|---|---|---|---|---|
Nasopharynx | 25 | 7 | 0 | 0 | 0.008 |
Oropharynx | 3 | 3 | 2 | 24 | 0.655 |
Nasal cavity | 6 | 1 | 6 | 19 | 0.059 |
Laryngopharynx | 0 | 0 | 2 | 30 | 0.157 |
Soft palate | 0 | 0 | 3 | 29 | 0.083 |
Parapharyngeal space | 11 | 13 | 0 | 8 | <0.001 |
Longus capitis | 5 | 9 | 4 | 14 | 0.052 |
Retropharyngeal space | 6 | 14 | 1 | 11 | 0.001 |
Skull base | 15 | 4 | 4 | 9 | 1.000 |
Sphenoid sinus | 3 | 5 | 7 | 17 | 0.564 |
Ethmoid sinus | 1 | 0 | 8 | 23 | 0.005 |
Masticator space | 1 | 3 | 3 | 25 | 1.000 |
Cavernous sinus | 2 | 2 | 3 | 25 | 0.655 |
Intracranial | 1 | 0 | 2 | 29 | 0.157 |