CD40LG and lymph node disorder: The remaining one patient with clinical VGPR showed significantly reduced uptake of 68Ga-pentixafor in bone marrow, but residual lymph node disease avid for 68Ga-pentixafor was also noted, although the reduction of TLUCXCR4 and MTVCXCR4 was consistent with IgM response (∆M-pro% 100%, ∆IgM% 97.3%, ∆TLUCXCR4% 93.5%, ∆MTVCXCR4% 90.0%).