Objective: The study aim was to develop and validate models to predict clinically significant posthepatectomy liver failure (PHLF) and serious complications [a Comprehensive Complication Index (CCI)>40] using preoperative and intraoperative variables. Background: PHLF is a serious complication after major hepatectomy but does not comprehensively capture a patient’s postoperative course. Adding the CCI as an additional metric can account for complications unrelated to liver function. Methods: The cohort included adult patients who underwent major hepatectomies at 12 international centers (2010–2020). After splitting the data into training and validation sets (70:30), models for PHLF and a CCI>40 were fit using logistic regression with a lasso penalty on the training cohort. The models were then evaluated on the validation data set. Results: Among 2192 patients, 185 (8.4%) had clinically significant PHLF and 160 (7.3%) had a CCI>40. The PHLF model had an area under the curve (AUC) of 0.80, calibration slope of 0.95, and calibration-in-the-large of −0.09, while the CCI model had an AUC of 0.76, calibration slope of 0.88, and calibration-in-the-large of 0.02. When the models were provided only preoperative variables to predict PHLF and a CCI>40, this resulted in similar AUCs of 0.78 and 0.71, respectively. Both models were used to build 2 risk calculators with the option to include or exclude intraoperative variables (PHLF Risk Calculator; CCI>40 Risk Calculator). Conclusions: Using an international cohort of major hepatectomy patients, we used preoperative and intraoperative variables to develop and internally validate multivariable models to predict clinically significant PHLF and a CCI>40 with good discrimination and calibration.

Objective: To evaluate the European experience after Adult-to-adult living donor liver transplantation using the left liver (LL-aLDLT).Summary Background Data: LL-aLDLT decreases donor risk but provides a smaller graft that increases recipient risk as compared with right liver (RL-aLDLT). However, there is little knowledge of results obtained after LL-aLDLT in Europe.Methods: This is a European multicenter retrospective study which aims to analyze donor and recipient outcomes after 46 LL-aLDLT.Results: Seventy-six percent of the grafts were harvested by minimally invasive approach. Mean donor hospital stay was 7.5 ± 3.5 days. Donor liver function was minimally impaired, with 36 donors (78.3%) without any 90-day complication, and 4 (8.7%) presenting major complications. One, 3, and 5-year recipient survival was 90.9%, 82.7%, and 82.7%, respectively. However, graft survival was of 59.4%, 56.9%, and 56.9% at 1, 3, and 5 years respectively, due to a 26.1% urgent liver retransplantation (ReLT) rate, mainly due to SFSS (n = 5) and hepatic artery thrombosis (HAT, n = 5). Risk factor analysis for ReLT and HAT showed an association with a graft to body weight ratio (GBWR) <0.6% (P= 0.01 andP= 0.024, respectively) while SFSS was associated with a recipient MELD ≥14 (P= 0.019). A combination of donor age <45 years, MELD 0.6% was associated with a lower ReLT rate (0% vs. 33%,P= 0.044).Conclusions: Our analysis showed low donor morbidity and preserved liver function. Recipient outcomes, however, were hampered by a high ReLT rate. A strict selection of both donor and recipients is the key to minimize graft loss.