SNHG12 and neoplasm: SNHG1, SNHG3, SNHG4, SNHG6, SNHG7, SNHG12, SNHG14, SNHG16, SNHG17, SNHG20 and SNHG22 act as oncogenes to promote tumor growth, while SNHG9 acts as a tumor suppressor gene.