”Squamous Cell Carcinoma of head and neck”ti,ab,kw OR ”Neoplasms, unknown primary” ti,ab,kw OR ”Neck Dissection” ti, ab, kw OR
Squamous Cell Caricinoma” ti,ab,kw ”Unknown primary” :ti,ab, kwOR ”Cervical lymphadenectomy”:ti,ab,kw
”Head and Neck Cancer”:ti,ab,kw OR ”Carcinoma of unknown primary” :ti,ab, kw
”Head and Neck SCC”:ti,ab’kw OR