In the 1,457 cell lines found listed in the Cancer Cell Line Encyclopedia, leukemias and myelomas had the highest expression as measured by RNAseq among the 40 lineages examined but it is notable that the 55 OvCa cell lines were the thirteenth highest lineage in PTP4A3 expression with a mean mRNA expression level 3.8-fold higher than that seen in the human cancer line collection. Here, PTP4A3 is linked to plasma cell myeloma.