CHCHD2 and neoplasm: The result indicates that the CHCHD2 expression was significantly associated with smoking (P = 0.045), tumor size (P = 0.000), differentiation degree (P = 0.034), TNM stage (P = 0.000), lymph metastasis (P = 0.000), but there was no significant of CHCHD2 expression correlation with gender (P = 0.139), age (P = 0.567), tumor position (P = 0.306) and tumor category (P = 0.082).