Unilateral humoral rejection after reoperative single-lung transplant.

The role of antibody-mediated rejection in acute and chronic rejection after lung transplantation is poorly understood. We report the case of a prior single-lung transplant recipient undergoing an acute antibody-mediated rejection isolated to her new, contralateral single-lung transplant. A 44-year-old woman 6 years after undergoing a single-lung transplant for idiopathic pulmonary fibrosis underwent a second single-lung transplant for bronchiolitis obliterans syndrome. Despite a negative crossmatch, she subsequently exhibited severe antibody-mediated rejection to her new allograft within 6 days of transplantation. The process of allograft sensitization is dynamic, and further study is warranted to better understand this process.