We found that high sCD163 at diagnosis was associated with shorter progression-free survival (PFS) and shorter overall survival (OS) (log rank test p = 0.002 and p < 0.001, respectively) in 81 newly diagnosed patients that were subsequently treated with chemoimmunotherapy. The same was seen in a cohort of 50 relapsed, heavily pretreated, MCL patients mainly treated within the phase II Philemon-trial with rituximab, ibrutinib and lenalidomide (log rank test, PFS p = 0.016 and OS p = 0.035).