Definition

Cancer (1) has spread to any of the following: the part of the eye socket near the nose or the bottom of the eye socket, the maxillary sinus, the roof of the mouth, and/or the bone between the eyes; or (2) is found in the nasal cavity or ethmoid sinus and may have spread to any of the following: the part of the eye socket near the nose or the bottom of the eye socket, the maxillary sinus, the roof of the mouth, and/or the bone between the eyes. Cancer has also spread to one lymph node on the same side of the neck as the cancer, and the lymph node is 3 centimeters or smaller.