We found that higher SNHG12 expression (P = 0.029), older age (P = 0.008), a greater tumor invasion depth (P = 0.030), lymph node metastasis (P = 0.001), distant metastasis (P = 0.007) and a higher TNM stage (P < 0.001) were associated with poorer survival in GC patients. Here, SNHG12 is linked to neoplasm.