Evaluation of Immunoregulatory Cells in Hematopoietic Stem Cell Transplant

Evaluation of Immunoregulatory Cells in Hematopoietic Stem Cell Transplant (HSCT)

The investigators' hypothesis is that the graft-versus-tumor effect can be enhanced while minimizing the complications of graft-versus-host disease.

The investigators' hypothesis is that the graft-versus-tumor effect can be enhanced while minimizing the complications of graft-versus-host disease (GVHD) by determining the qualitative and quantitative changes in T regulatory cells throughout the transplant process. Their understanding of this can lead to new treatment strategies and improved clinical therapeutic implications.

Inclusion Criteria:

• Patients 18-70 years old undergoing either autologous transplant or allogeneic transplant for various hematologic conditions

Exclusion Criteria:

• Patients < 18 or > 70 years old undergoing either autologous transplant or allogeneic transplant