acute graft versus host disease (MONDO_0020546) is a syndrome of immunologically mediated tissue damage that may occur following an allogeneic transplant, usually affecting the skin, liver, and GI tract. The onset is usually within one hundred days of transplantation or immunologic manipulation. Also known as: GVHD, acute, acute graft vs. host disease, fulminant graft versus host disease, graft versus host disease, acute.