Graft Enhancement, Immunologic

**Definition:** The induction of prolonged survival and growth of allografts of either tumors or normal tissues which would ordinarily be rejected. It may be induced passively by introducing graft-specific antibodies from previously immunized donors, which bind to the graft's surface antigens, masking them from recognition by T-cells; or actively by prior immunization of the recipient with graft antigens which evoke specific antibodies and form antigen-antibody complexes which bind to the antigen receptor sites of the T-cells and block their cytotoxic activity.

**Tree numbers:** - E02.095.465.425.450.440 - E05.478.610.500

**Synonyms:** - Enhancement, Immunologic Graft - Immunologic Graft Enhancement - Immunologic Enhancement of Grafts - Graft Enhancement, Immunological