MALAT1 and cancer: Metastasis-associated lung adenocarcinoma transcript-1 (MALAT-1) is overexpressed in several cancers and exerts its effect by controlling gene expression and stimulating cell proliferation, migration, and metastasis and playing a dynamic role in mediating the epithelial-to-mesenchymal transition (EMT), which leads to the acquisition of stem cell-like properties and chemoresistance.