GAS5 and metastatic malignant neoplasm in the lymph nodes: However, there was no significant correlation between GAS5 expression and other factors, such as gender, age, smoking history, lymph node metastasis, distal metastasis, and carcinoembryonic antigen (CEA), carbohydrate antigen 19–9 (CA19-9), and cancer antigen 125 (CA125) expression (Table 1).