stage I

Definition of stage I nasal cavity and ethmoid sinus cancer
National Cancer Institute

stage I nasal cavity and ethmoid sinus cancer

(...NAY-zul KA-vih-tee…ETH-moyd SY-nus KAN-ser)
Cancer is found in only one area of either the nasal cavity or the ethmoid sinus and may have spread into bone.

Source: NCI Dictionary of Cancer Terms