system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Two hours after undergoing allogeneic kidney transplantation for polycystic kidney disease, a 14-year-old girl has lower abdominal pain. Examination shows tenderness to palpation in the area the donor kidney was placed. Ultrasound of the donor kidney shows diffuse tissue edema. Serum creatinine begins to increase and dialysis is initiated. Which of the following is the most likely cause of this patient's symptoms?
assistant
Preformed antibodies against class I HLA molecules