The impact of advanced age according to IPSSWM cut-off on the outcome of symptomatic and asymptomatic Waldenström's macroglobulinemia at diagnosis.

Advanced age is one of the variables more frequently considered to be associated with an adverse prognosis in Waldenström's macroglobulinemia (WM). In a series of 238 symptomatic and asymptomatic WM patients, we retrospectively identified an age cut-off distinguishing two groups of patients with different outcome in terms of overall survival (OS), disease-specific survival (DSS) and treatment-free survival (TFS). Although for the OS the best cut-off was identified at 65 years with shorter OS for elderly patients, no difference was detected in terms of DSS between the two groups. Furthermore, patients over 65 years showed a longer TFS compared with patients under 65 years. Clinical and laboratory disease characteristics did not significantly differ between the two groups of patients except for β2M level. Therefore, the poorer survival of patients over 65 years at diagnosis should probably be attributed to the higher number of no disease-related deaths and is independent from WM.