Keywords Hypopharyngeal Neoplasm;Carcinoma, Squamous Cell;Fragile Histidine Triad Gene;Immunohistochemistry;Tumor Suppressor Gene;nested RT-PCR;

• 下咽肿瘤;癌;鳞状细胞;脆性组氨酸三联体基因;免疫组织化学;抑癌基因;巢式逆转录聚合酶链反应;