“…PRA reduction was generally incomplete and cross-matches remained positive at transplant, but graft dysfunction was not observed in the two lung allograft recipients, who died of CMV (7 months) and obliterative bronchiolitis (N 4 years). The Harefield case, where ABO-incompatible graft injury was not seen despite an anti-A titer of 1:256 [13], and a Minnesota case [34], where anti-HLA A2-associated HAR was apparently reversed, indicate that immediate plasmapheresis with selective or non-selective reduction in titer of pathogenic antibodies is a rational approach to prevent humoral graft injury in this circumstance. These cases and our Vanderbilt experience indicate that accommodation and antigen-specific tolerance can occur, although the conditions required to accomplish this remain uncertain.…”