Definition of myeloid engraftment after allogeneic hematopoietic stem cell transplantation.

Neutrophil counts continued to rise after reaching 0.5x10(9)/L in 78 allograft recipients receiving granulocyte colony-stimulating factor (G-CSF) post-transplant. This was confirmed in 44 subsequent patients not receiving G-CSF. This suggests that the first day of neutrophils >or=0.5x10(9)/L can be considered a valid definition of myeloid recovery after allogeneic transplantation.