Approximately 30 SNHG genes were identified in the human genome, and some of them (SNHG1, SNHG3, SNHG5, SNHG6, SNHG7, SNHG12, SNHG15, SNHG16, and SNHG20) have been reported as overexpressed in different types of human cancers [68]. Here, SNHG15 is linked to cancer.