The effect of a positive T-lymphocytotoxic crossmatch on hepatic allograft survival and rejection.
The influence of crossmatching in liver transplantation is still controversial, and at present, our unit does not alter management according to the result of standard lymphocytotoxicity testing. This study retrospectively assessed outcome of grafts transplanted in the presence of preformed antidonor cytotoxic antibody. One hundred twelve patients undergoing their first orthotopic liver transplantation had results available (mean follow-up: 18 months). Twelve patients had a positive crossmatch and 100 negative. The 1-year graft survival was 58% in the positive crossmatch group, compared with 81% in the negative crossmatch group (P = .02). The 1-year patient survival was 83% in the positive crossmatch group compared with 90% in the negative group (P = .41). Acute cellular rejection occurred in 6 of 7 (86%) grafts surviving more than 7 days in the positive crossmatch group compared with 46 of 88 (52%) grafts in the negative group (P = .09). However, episodes of further acute cellular rejection requiring treatment occurred in 4 of the 6 grafts in the positive crossmatch group but in only 4 of the 46 grafts with a negative crossmatch (P = .0006). The authors conclude that evidence exists in our population that preformed antidonor antibodies adversely affect the outcome of hepatic allografts but not patient survival.