Transplant rejection occurs when the immune system detects the
transplanted organ as foreign.
The immune system protects the
body from substances that may be harmful. Antigens are found on the surface of
these substances. If the immune system recognizes these antigens as foreign
(not part of the body), it will attack them.
works in the same way. A foreign tissue or organ can trigger a transplant
rejection. Organ recipients need to take immunosuppressive drugs to prevent
E. Gregory Thompson, MD - Internal Medicine & Anne C. Poinier, MD - Internal Medicine