MALAT1 and cancer: The function of lncRNA MALAT1, upregulated and oncogenic in a variety of malignancies, included TNBC [48,49,50], has been extensively studied in cancer cells; however, its role in the cross-talk between different cell types in the TME still has to be revealed, and the identification of exosomal MALAT1 now opens up an extremely fascinating and unexplored area of research.