Recent reports have suggested that the total number of autologous or a
llogeneic hematopoietic stem cell (HSC) infused after high-dose chemot
herapy might predict survival, post-transplant morbidity and rate of h
ematopoietic engraftment, However, HSC capable of longterm multilineag
e potential are still poorly defined, and tools for accurate and repro
ducible HSC enumeration are highly warranted.