For further validation on a larger cohort of the 28 MM and 12 PCL samples, RT-qPCR was performed, analyzing the expression of four candidate lncRNAs: lymphocyte antigen antisense RNA 1 (LY86-AS1), MIR9-3 Host Gene (MIR9-3HG), VIM antisense RNA 1 (VIM-AS1), and Prostate Cancer-Associated Transcript 7 (PCAT7). Here, VIM-AS1 is linked to plasma cell leukemia.