T86: Failure and rejection of transplanted organs and tissues

T86.9: Failure and rejection of unspecified transplanted organ and tissue

When tissue is donated, the patient’s tissue and the donated tissue should be as similar to one another as possible. Otherwise the immune system may attack the donated tissue. For example, the immune system also fights altered body cells or disease pathogens. Therefore certain tissue characteristics are compared before a tissue donation. For example, one such characteristic of a tissue is the blood group.

There are various reasons why a donor organ or donor tissue does not work properly. For example, the immune system may be fighting it. The donor organ or the donor tissue may be inflamed and damaged by this. Sometimes a donor organ or donor tissue does not receive enough blood.