<unk>  <unk> D) is a syndrome, characterized by inflammation in different organs.<unk> D is commonly associated with bone marrow transplants and stem cell transplants. White blood cells of the donor's immune system which remain within the donated tissue (the graft) recognize the recipient (the<unk>  as foreign (non-self). The white blood cells present within the transplanted tissue then attack the recipient's body's cells, which leads to<unk> D. This should not be confused with a transplant rejection, which occurs when the immune system of the transplant recipient rejects the transplanted tissue;<unk> D occurs when the donor's immune system's white blood cells reject the recipient. The underlying principle (alloimmunity) is the same, but the details and course may differ.<unk> D can also occur after a blood transfusion if the blood products used have not been irradiated or treated with an approved pathogen reduction system.
Graft-versus-host disease
Transplant rejection
Cardiac allograft vasculopathy
Vasculogenic mimicry
Infectious tolerance
Disseminated disease
Chronic allograft nephropathy
Post-transplant lymphoproliferative disorder