PCAT1 and lung adenocarcinoma: These molecules are aberrantly expressed in several cancers [36], such as Prostate Cancer-Associated Transcript 1 (PCAT-1) in prostate cancer [40], colorectal neoplasia differentially expressed (CRNDE) in colorectal cancer [41], and metastasis-associated lung adenocarcinoma (MALAT1) [42], HOX antisense intergenic RNA (HOTAIR) [43], and breast cancer anti-estrogen resistance 4 (BCAR4) [44] in breast cancer.