title: Current concepts in transplant surgery: liver transplantation today.
abstract: BACKGROUND
  The discipline of liver transplantation (LTx) has been developed over the past decades, and LTx is now considered the gold standard for the treatment of patients with end-stage liver diseases and early liver tumors in cirrhotic livers. This procedure is now performed routinely in many transplant centers, and it has provided an enormous technical innovation to the field of hepatobiliary surgery. Allocation decision of liver organs is based on medical need and timing.
  
  
  METHODS
  The Mayo Model for End Stage Liver Disease based on patient-specific criteria was developed and applied to prioritize patients on the waiting list. From the donor aspects of LTx, sources of organ, excluding xenotransplantation, can be brain-dead donors, living donors, and non-heart-beating donors. Today, the majority of livers are procured from cadaveric donors. In addition to the conventional LTx, other types are living-donor LTx, reuse of grafts as domino transplantation, ex situ as well as in situ split LTx, and reduced-size LTx. The transplantation procedure consists of several steps including donor selection and management, liver procurement and preservation, back-table preparation, recipient operation with liver implantation, postoperative care, immunosuppression, and follow-up.
  
  
  RESULTS
  The postoperative complications are divided into surgical, non-surgical, and multifactorial complications. Surgical complications account about 34% of morbidities after LTx and are mainly categorized to vascular and biliary complications. The main medical ones are non-surgical bleeding and infections. The multifactorial complications include primary non- or poor function and small-for-size syndrome. The pretransplant outcome predictors of LTx can be divided into donor, recipient, operative, and postoperative factors.
  
  
  CONCLUSIONS
  LTx is now considered a safe and standardized procedure with a substantially improved graft and patient survival and acceptable morbidity rates. However, the new problems, including recurrence of hepatitis C or hepatocellular carcinoma, chronic biliary complications, opportunistic infections, and development of de-novo malignancies are the major problems affecting the long-term outcome of transplanted patients.
authors.affiliation: Department of General, Visceral and Transplantation Surgery, Division of Visceral Transplantation, University of Heidelberg, Heidelberg, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Mehrabi
authors.forename: H
authors.initials: H
authors.lastname: Fonouni
authors.forename: S A
authors.initials: SA
authors.lastname: Müller
authors.forename: J
authors.initials: J
authors.lastname: Schmidt
mesh_terms: D000368:Aged; D002102:Cadaver; D005060:Europe; D005544:Forecasting; D005858:Germany; D006498:Hepatectomy; D006801:Humans; D007362:Intensive Care Units; D008103:Liver Cirrhosis / Q000150:complications / Q000453:epidemiology / Q000601:surgery*; D017093:Liver Failure / Q000453:epidemiology / Q000601:surgery*; D008111:Liver Function Tests; D008113:Liver Neoplasms / Q000453:epidemiology / Q000601:surgery*; D016031:Liver Transplantation / Q000639:trends*; D019520:Living Donors / Q000600:supply & distribution; D010348:Patient Care Team / Q000639:trends; D011183:Postoperative Complications / Q000209:etiology / Q000601:surgery; D012086:Reoperation; D020858:Tissue and Organ Harvesting; D009927:Tissue and Organ Procurement / Q000639:trends; D014850:Waiting Lists