Lee EC, et al. - This systematic review strived to assess the differences in outcomes between ABO-incompatible (ABO-I) liver transplantation (LT) and ABO-compatible (ABO-C) LT. In graft survival and several complications, ABO-I LT was inferior to ABO-C LT, although patient survival in ABO-I LT was comparable to that in ABO-C LT. In pediatric patients and those using rituximab, graft survival of ABO-I LT could be comparable to that of ABO-C LT.