Transfusion-associated graft-versus-graft and potential graft-versus-host disease in a renal allotransplanted patient.

Transfusion-associated graft-versus-host disease (GVHD) is a rare but often fatal condition. We report on a case in which a 54-year-old man with polycystic kidneys shortly after receiving a male cadaver donor kidney developed severe intractable rejection and symptoms of GVHD. In situ hybridization with a Y chromosome- "specific" DNA probe and combined in situ hybridization and immunohistochemistry with monoclonal antibodies defining cellular phenotypes were performed on biopsy and tissue specimens taken at rejection episodes and from the lost allograft. The vast majority of infiltrating leukocytes in the morphologically rejecting kidney parenchyma were of female origin and consisted mainly of T lymphocytes and macrophages. This could only be explained by engraftment of leukocytes received in connection with transfusion of female whole blood in association with the transplantation. The patient developed symptoms of GVHD, and graftectomy was performed due to life-threatening cytomegalovirus infection. This case of combined "graft"-versus-graft disease and GVHD indicates that precautions in the administration of blood transfusion to severely immunosuppressed patients should be taken. We recommend the use of gamma-irradiated and lymphocyte-depleted blood products.