Organ transplantation is when an organ in the body gets damaged and is replaced with a healthy organ from a donor. Transplant organs and tissues include the liver, heart, kidney, bone marrow, and pancreas. However, recipients might experience organ transplant rejection when their immune system attacks the new tissue.
This rejection is due to the antigens on the transplanted organ that differ from the ones in the recipient’s body. There are three types of transplant rejection:
- Hyperacute Rejection ⏤ It occurs minutes to hours after surgery. Doctors must remove the new organ immediately.
- Acute Rejection ⏤ It may occur from one week to three months after the surgery. It is treatable with organ transplant medications.
- Chronic Rejection ⏤ It occurs months to years after the surgery due to scarring of the transplanted organ.