Stage II includes: T2, N0, M0. T2: Maxillary sinus: Tumor causing bone erosion or destruction including extension into the hard palate and/or middle nasal meatus, except extension to posterior wall of maxillary sinus and pterygoid plates. Nasal cavity and ethmoid sinus: Tumor invading two subsites in a single region or extending to involve an adjacent region within the nasoethmoidal complex, with or without bony invasion. N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 6th and 7th ed.) [from NCI]