- Patients should have at least one of the following pathological features for inclusion: pT3 or pT4 and any nodal stage (N), except T3N0 of the larynx, with negative resection margins, or a tumor stage of 1 or 2 with a nodal stage of 2 or 3 and no distant metastasis (M0); patients with stage T1 or T2 and N0 or N1 who had unfavorable pathological findings (extranodal spread, positive resection margins, perineural involvement, or vascular tumor embolism) are also eligible, as are those with oral-cavity or oropharyngeal tumors with involved lymph nodes at level IV or V.