[Pre- and para-tracheal lymph node metastasis of head and neck cancer].
D000368:Aged; D005260:Female; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D008207:Lymphatic Metastasis / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis