PCAT1 and gastric adenocarcinoma: As shown in Table 3, eighteen lncRNAs are related to tumor size, including double homeobox A pseudogene 8 (DUXAP8), gastric adenocarcinoma predictive long intergenic non-coding RNA (GAPLINC), zinc finger antisense 1 (ZFAS1), P73 antisense RNA 1?T (TP73-AS1), non-coding RNA-activated by DNA damage (NORAD), small nucleolar RNA host gene 5 (SNHG5), small nucleolar RNA host gene 16 (SNHG16), prostate cancer associated transcript-1 (PCAT-1), TUG1, MALAT1, CAT266, CAT1297, CAT1647, linc-UBC1, UCA1, MEG-3, LSINCT5, and PTENP1.