Decreased analgesic requirement in recipient of liver transplantation from monozygotic twin

Background: There have been many reports about decreased analgesic requirements in liver transplant recipients compared with patients undergoing other abdominal surgery. Case: Herein we describe a case in which a 42-year-old man underwent living donor liver transplantation from his monozygotic twin. Because innate pain thresholds may be similar in monozygotic twins, we could effectively investigate postoperative pain in the donor and the recipient. Concordant with previous reports, the recipient used less analgesic than the donor in the present study. Conclusions: Physicians caring for patients who have received liver transplantation should consider their comparatively low requirement for analgesic, to prevent delayed recovery due to excessive use of analgesic.