When your patient complains of a neck mass.
D000368:Aged; D003560:Cysts / Q000175:diagnosis; D006258:Head and Neck Neoplasms / Q000175:diagnosis* / Q000601:surgery / Q000628:therapy; D006801:Humans; D008199:Lymphadenitis / Q000175:diagnosis; D008207:Lymphatic Metastasis / Q000175:diagnosis; D009333:Neck