PVT1 and gastric adenocarcinoma: Since few ferroptosis-related ncRNAs were shared by the TCGA-STAD and GSE84426 cohorts, we screened five optimal ferroptosis-related ncRNAs with the prognostic value in gastric adenocarcinoma: lncRNA TMEM105 (ENSG00000185332), lncRNA PVT1 (ENSG00000249859), ncRNA LOC646588 (ENSG00000223561), ncRNA FLJ22447 (ENSG00000232774), and lncRNA DLEU1 (ENSG00000176124).