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graft-versus-host disease

n :  a bodily condition that results when T cells from a usu. allogeneic tissue or organ transplant and esp. a bone marrow transplant react immunologically against the recipient's antigens attacking cells and tissues, that affects esp. the skin, gastrointestinal tract, and liver with symptoms including skin rash, fever, diarrhea, liver dysfunction, abdominal pain, and anorexia, and that may be fatal - abbr. GVHD - called also graft-versus-host reaction  .

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