LINC00520 and breast cancer: The expression of LINC00520 was upregulated in primary nasopharyngeal carcinoma.17 In addition, the level of LINC00520 was significantly increased in renal cell carcinoma.18LINC00520 promoted the migration of BC cells induced by Src, STAT3, and PI3K and played a functional role in BC.19 Although it was reported that the lncRNA LINC00520 was associated with BC, the complexity of its function was also determined by the complexity of the lncRNAs structure.