The occult primary in head and neck surgery.
D000230:Adenocarcinoma / Q000175:diagnosis; D000231:Adenocarcinoma, Papillary / Q000175:diagnosis; D000328:Adult; D000368:Aged; D002277:Carcinoma / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D006258:Head and Neck Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D037981:Neck Dissection; D009362:Neoplasm Metastasis / Q000175:diagnosis*; D011379:Prognosis