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When one of your own organs fails to work, then you may need an organ transplant. This can happen because of illness or injury. When you are undergoing such a procedure, doctors replace the organ in your body with a healthy organ from another person. There are some organs that can be transplanted, including pancreas, lung, liver, kidney, intestine and heart. Organ Transplantation is a type of surgery that replaces the recipient's damaged or absent organ with a healthy organ from another person or from a donor site on the recipient's own body. Scientists and engineers are allowed by the emerging field of regenerative medicine to make organs grow again from the patient's own cells, including stem cells, or cells extracted from the failing organs. People call organs or tissues both of which are transplanted within the same person's body autografts. And people call transplants that are operated between two items of the same species allografts. Allografts may be taken from an either living or dead body. In terms of Organ Transplantation, there are two types of donor, namely living donors and deceased donors. In terms of the former, they remain alive and donate a renewable tissue, cell, or fluid, or an organ or part of an organ in which the remaining organ can regenerate or do the job of the rest of the organ. After organ, transplantation is done, some patients may unluckily encounter transplant rejection. Transplant rejection is a process during which the recipient's immune system rejects and attacks the transplanted organ or tissue. Hyperacute rejection takes place not long after the transplant, if the antigens are totally unmatched. If the tissue didn’t be removed right away, the recipient would die. This often occurs when the blood type of the organ received by the patient is wrong. Acute rejection may take place any time from a week to three months after the procedure. Every patient will show some acute rejection in a way. Chronic rejection takes place a few years after the procedure. The transplanted tissues or organ is damaged by the body’s constant immune response against the new head neck surgery slowly. Generally speaking, people who need Organ Transplantation have to wait for a long period of time to find a right donator. To reduce the risk of transplant rejection, doctors always match donors to recipients before the procedure. If the recipient's body is not compatible with the new organ, the procedure will fail in the end. After the procedure, patients are required to take drugs all the time to help prevent their bodies from rejecting the new organ or tissue. Resource From: Organ Transplantation, And Head Neck Surgery
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