MTSS1 and mantle cell lymphoma: While the highest levels of MTSS1 were found in hairy cell and mantle cell lymphomas (Fig. 5c), expression of MTSS1 was also increased in CLL as compared to normal B cells and highest among different types of leukaemia, with the fold changes from normal peripheral blood mononuclear cells (PBMCs) ranging from 1.3–3.8 for different microarray probe sets (Fig. 5c,d).