Stage IVA nasal cavity and ethmoid sinus cancer

Stage IV nasal cavity and ethmoid sinus cancer is divided into stages IVA, IVB, and IVC. In stage IVA, (1) cancer has spread to any of the following: the eye, the skin of the nose or cheek, the front parts of the skull, the part of the sphenoid bone behind the upper jaw, and/or the sphenoid or frontal sinuses. Cancer may have 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; or (2) cancer is found in the nasal cavity or ethmoid sinus and may have spread to any of the following: the eye, the part of the eye socket near the nose, or the bottom of the eye socket, the skin of the nose or cheek, the front parts of the skull, the part of the sphenoid bone behind the upper jaw, and/or the sphenoid or frontal sinuses. Cancer has also spread to one of the following: one lymph node on the same side of the neck as the cancer and the lymph node is larger than 3 centimeters but not larger than 6 centimeters; or more than one lymph node on the same side of the neck as the cancer and the lymph nodes are not larger than 6 centimeters; or lymph nodes on the opposite side of the neck as the cancer or on both sides of the neck, and the lymph nodes are not larger than 6 centimeters.

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