The tumor (1) is larger than 4 centimeters or has spread to the larynx (voice box) or esophagus. Cancer may have spread to one lymph node on the same side of the neck as the tumor and the lymph node is 3 centimeters or smaller; or (2) has spread to one lymph node on the same side of the neck as the tumor and the lymph node is 3 centimeters or smaller and cancer is found (1) in one area of the hypopharynx and/or is 2 centimeters or smaller; or (2) in more than one area of the hypopharynx or in nearby tissues, or is larger than 2 centimeters but not larger than 4 centimeters and has not spread to the larynx.