SLAMF1 and B-cell chronic lymphocytic leukemia: Recently, Gordiienko et al. (2024) reported that the sSLAMF1/CD150 isoform was found in all studied plasma samples of CLL patients at different levels regardless of the cell surface SLAMF1/CD150 expression status of B cells and sSLAMF1/CD150 mRNA expression [39].