Squamous Cell Carcinoma of head and neck [mh] OR Neoplasms, unknown primary [mh] OR Neck Dissection [mh] OR
Squamous cell carcinoma of head and neck OR Neoplasms, unknown primary OR Neck dissection [tw] OR
Head and Neck Cancer OR Unknown primary OR Cervical lymphadenectomy [tw]
Head and Neck SCC OR Carcinoma of unknown primary
Squamous cell carcinoma