Objective To evaluate the histological characteristics of xenogeneic graft-versus-host disease(GVHD),and to differentiate it from the allogeneic GVHD.

目了解异种移植物宿主病(GVHD)组织学特点，与同种GVHD及异种脾脏移植关系。

Donor-cell leukemia after allogeneic hematopoietic stem cell transplantation can be an ideal model to investigate the related events in human leukemogenesis.

异基因造血干细胞移植后供者源复发可能是研究人白血病发生适宜模式。