Inclusion Criteria:  Histologically confirmed HNC including Oral Cavity, Oropharyngeal, Nasopharynx, Hypopharyngeal, and Laryngeal Cancers Clinical stage II-IVa according to the American Joint Committee of Cancer (the seventh edition) Eastern Cooperative Oncology Group (ECOG) performance status 0-2  Exclusion Criteria:  Previous head and neck radiotherapy Previous cervical lymph node dissection Active infections Palliative treatment