Definition

Cancer (1) has spread to any of the following: the bone at the back of the maxillary sinus, the tissues under the skin, the part of the eye socket near the nose or the bottom of the eye socket, the area behind the cheek bone, and/or the ethmoid sinus; or (2) is found in the maxillary sinus and may have spread to any of the following: the bones around the maxillary sinus (including the roof of the mouth and the nose), the tissues under the skin, the part of the eye socket near the nose or the bottom of the eye socket, the area behind the cheek bone, and/or the ethmoid sinus. 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.