CD4 and AL amyloidosis: Our data were indicative that FABP5 mRNA displayed correlations to B cells memory, B cells naïve, dendritic cells activated, macrophages M0, macrophages M1, macrophages M2, neutrophils, activated NK cells, resting memory CD4 T cells, CD8 T cells and Tregs, suggesting the relationships of FABP5 mRNA with immune microenvironment of multiple myeloma.