• Another clue is the type of pathology . If a person
      has epidermoid carcinoma in lymph glands high in the
      neck, for example, the primary site is most often in
      the nasopharynx , the throat or the tonsils. Special
      endoscopic procedures and biopsies can be used to
      look for the primary site and even if it is not found,
      such people are often treated for head and neck
      cancer. Epidermoid cancer involving low cervical
      nodes is usually of lung origin. Cervical lymph nodes
      with metastases of other pathological appearance
      may represent breast cancer, lymphoma, melanoma
      or other tumors.
     ( See also "Special Pathologic Methods" )