To better explore the associations between FAS 670 A > G and 1377 G > A variants with the overall survival of patients received chemotherapy, stratified analysis was performed based on the ages, tumor sizes and sites, tumor differentiation, histological types, lymph node metastasis, invasion depth, metastasis distant and TNM stage (Table 3). Here, FAS is linked to metastatic malignant neoplasm in the lymph nodes.