MALAT1 and cancer: A few studies have associated certain lncRNAs with poor outcome and disease progression in different types of cancer: high HOTAIR expression was found in several types of cancer, including breast and colorectal cancer [16-18], overexpression of PCAT-1 has been observed in prostate cancer [19] and overexpression of MALAT-1 has been observed in several types of cancer [15], including early-stage non small-cell lung cancer [20].