Nasal Cavity and Ethmoid Sinus Cancer pT4b TNM Finding v6

**Semantic type:** Finding

**Definition:** Nasal cavity and ethmoid sinus cancer with tumor invading any of the following: orbital apex, dura, brain, middle cranial fossa, cranial nerves other than the maxillary division of the trigeminal nerve, nasopharynx, or clivus. (from AJCC 6th Ed.)