Nasal Cavity and Ethmoid Sinus Cancer pT4a TNM Finding v7

**Semantic type:** Finding

**Definition:** Nasal cavity and ethmoid sinus cancer with moderately advanced local disease. Tumor invades any of the following: anterior orbital contents, skin of nose or cheek, minimal extension to anterior cranial fossa, pterygoid plates, sphenoid or frontal sinuses. (from AJCC 7th Ed.)