High expression of Sirt7 protein was significantly associated with liver or peritoneal metastasis (p < 0.0001), tumor size (p = 0.0126), extent of gastrostomy (p = 0.0364), depth of invasion (p = 0.0113), lymph node involvement (p = 0.0014) and TNM stage (p < 0.0001, Table 1). Here, SIRT7 is linked to metastasis.