Systematic head and neck examination.
D006258:Head and Neck Neoplasms / Q000175:diagnosis*; D006801:Humans; D009062:Mouth Neoplasms / Q000175:diagnosis*; D009303:Nasopharyngeal Neoplasms / Q000175:diagnosis*; D010808:Physical Examination; D013964:Thyroid Neoplasms / Q000175:diagnosis*