To study correlations between MALAT1 and metastatic capacity of two different molecular subtypes of breast cancer, the expressions of MALAT1 in samples with non-metastatic TNBC, highly metastatic TNBC (no fewer than 4 metastatic lymph nodes), non-metastatic, and highly metastatic Her-2 positive breast cancer (no fewer than 4 metastatic lymph nodes) were detected by qRT-PCR. This evidence concerns the gene MALAT1 and breast cancer.