What is chronic rejection?

What is chronic rejection?

• A. Chronic inflammation and scarring that occurs over months or years, with no cure.
• B. Rejection within minutes to 48 hours.
• C. An acute process that responds to additional therapy.
• D. Graft attacks host.

Answer: (A)

Chronic rejection is a slow, ongoing immune-mediated injury to a transplanted organ that gradually leads to loss of function. It develops over months to years, unlike the early, rapid processes that occur soon after transplant. The hallmark is chronic inflammation with fibrosis and scarring of graft tissue, along with vascular changes that impair blood supply to the organ. Because the damage accumulates over a long period and established fibrosis is hard to reverse, there is no cure for chronic rejection; treatment mainly aims to slow progression and optimize graft function. Other scenarios describe different timelines and responses: rejection that happens within minutes to hours is a hyperacute or very early acute process, typically driven by preformed antibodies and is not the slow, progressive pattern seen in chronic rejection. An acute rejection episode can occur days to weeks after transplant and often responds to intensified immunosuppression. Graft-versus-host disease refers to donor immune cells attacking the host in stem cell or bone marrow transplants, not a solid organ graft chronic rejection.

Chronic rejection is a slow, ongoing immune-mediated injury to a transplanted organ that gradually leads to loss of function. It develops over months to years, unlike the early, rapid processes that occur soon after transplant. The hallmark is chronic inflammation with fibrosis and scarring of graft tissue, along with vascular changes that impair blood supply to the organ. Because the damage accumulates over a long period and established fibrosis is hard to reverse, there is no cure for chronic rejection; treatment mainly aims to slow progression and optimize graft function.

Other scenarios describe different timelines and responses: rejection that happens within minutes to hours is a hyperacute or very early acute process, typically driven by preformed antibodies and is not the slow, progressive pattern seen in chronic rejection. An acute rejection episode can occur days to weeks after transplant and often responds to intensified immunosuppression. Graft-versus-host disease refers to donor immune cells attacking the host in stem cell or bone marrow transplants, not a solid organ graft chronic rejection.