MALAT1 and neoplasm: As compared with normal breast tissues, 24 (5.4%) tumours showed Δsv-MALAT1 mRNA overexpression (NΔsv-MALAT1 from 3.16 to 8.4), and surprisingly 84 (18.8%) tumours showed Δsv-MALAT1 mRNA underexpression (NΔsv-MALAT1 from 0.05 to 0.32).