Waldenstrom's disease is a lymphoproliferative disorder that is typically t
reated with plasmapheresis and/or alkylating agents. In young patients, oth
er lymphoproliferative disorders have been treated with allogeneic transpla
ntation. Two patients with aggressive Waldenstrom's disease, who progressed
in spite of multi-agent chemotherapy and autologous stem cell transplantat
ion, in one case, underwent allogeneic transplantation from their HLA-ident
ical donors. Both remain alive with event-free survivals of more than 3, an
d more than 9 years, respectively. Allogeneic transplantation should be con
sidered for young patients with Waldenstrom's disease.