SDC1 and plasma cell myeloma: A stronger trend was generally observed for correlations of FLCs and sCD138 in Light Chain Multiple Myeloma (R к/CD138 = 0.47and R λ/CD138 = 0.58) whereas this was not so evident in the Intact Immunoglobulin Light Chain Myeloma cohort (R к/CD138 = 0.46 and R λ/CD138 = 0.33).