BACKGROUND: Hepatic epithelioid hemangioendothelioma (HEHE) is a rare vascular tumor which has an intermediate aggressive behavior. Although the value of liver transplantation (LT) is well established, its place in the management of HEHE is still unclear. The aim of this study is to confirm, based on a very large patient cohort, the value of LT in the management of HEHE and to identify risk factors for post-LT recurrence. METHODS: The outcome of 149 transplant recipients with HEHE recorded in the European Liver Transplant Registry during the period November 1984 to May 2014 was analyzed. Median post-LT follow-up was 7.6 years (interquartile range, 2.8-14.4). RESULTS: Cox regression analysis showed that macrovascular invasion (hazard ratio [HR], 4.8; P < 0.001), pre-LT waiting time of 120 days or less (HR, 2.6; P = 0.01) and hilar lymph node invasion (HR = 2.2; P = 0.03), but not pre-LT extrahepatic disease, were significant risk factors for recurrence. These findings, which were also confirmed in a propensity score analysis, allowed the development of a HEHE-LT score enabling stratification of patients in relation to their risk of tumor recurrence. Patients with a score of 2 or less had a much better 5-year disease-free survival compared to those having a score of 6 or higher (93.9% vs 38.5%; P < 0.001). CONCLUSIONS: The analysis of this (largest in the world) HEHE adult liver recipient cohort clearly confirms the value of LT in the treatment of this rare disorder and also permits identification of patients at risk of posttransplant recurrence. Posttransplant follow-up should take the HEHE-LT score into account. Extrahepatic disease localization is reconfirmed not to be a contraindication for LT.

Starzl Abdominal Transplant Unit University Hospitals St Luc Université catholique Louvain Brussels Belgium 2 Centre Hépatobiliaire Paul Brousse Paris France 3 Medizinsche Hochschule Hannover Hannover Germany 4 Transplancenter IKEM Prague Czech Republic 5 Istituto Nazionale Tumori Milano Italy 6 Charité Campus Virchow Klinikum Berlin Germany 7 Department of General Transplant and Liver Surgery Medical University of Warsaw Warsaw Poland 8 UCJ Helsingfors Helsinki Finland 9 Department Abdominal transplantation Surgery Universitaire Ziekenhuizen Gasthuisberg KULeuven Belgium 10 Rikshospitalet Oslo Universitetssykehus Oslo Norway 11 Karolinska University Hospital Huddinge Stockholm Sweden 12 University Medical Centre Ljubljana Ljubljana Slovenia

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$a Lai, Quirino $u 1 Starzl Abdominal Transplant Unit, University Hospitals St. Luc, Université catholique Louvain, Brussels, Belgium. 2 Centre Hépatobiliaire Paul Brousse, Paris, France. 3 Medizinsche Hochschule Hannover, Hannover, Germany. 4 Transplancenter IKEM, Prague, Czech Republic. 5 Istituto Nazionale Tumori, Milano, Italy. 6 Charité Campus Virchow Klinikum, Berlin, Germany. 7 Department of General Transplant and Liver Surgery, Medical University of Warsaw, Warsaw, Poland. 8 UCJ Helsingfors, Helsinki, Finland. 9 Department Abdominal transplantation Surgery, Universitaire Ziekenhuizen Gasthuisberg KULeuven, Belgium. 10 Rikshospitalet, Oslo Universitetssykehus, Oslo, Norway. 11 Karolinska University Hospital, Huddinge, Stockholm, Sweden. 12 University Medical Centre Ljubljana, Ljubljana, Slovenia.

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$a Hepatic Epithelioid Hemangioendothelioma and Adult Liver Transplantation: Proposal for a Prognostic Score Based on the Analysis of the ELTR-ELITA Registry / $c Q. Lai, E. Feys, V. Karam, R. Adam, J. Klempnauer, M. Oliverius, V. Mazzaferro, A. Pascher, P. Remiszewski, H. Isoniemi, J. Pirenne, A. Foss, BG. Ericzon, S. Markovic, JP. Lerut, . ,

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$a BACKGROUND: Hepatic epithelioid hemangioendothelioma (HEHE) is a rare vascular tumor which has an intermediate aggressive behavior. Although the value of liver transplantation (LT) is well established, its place in the management of HEHE is still unclear. The aim of this study is to confirm, based on a very large patient cohort, the value of LT in the management of HEHE and to identify risk factors for post-LT recurrence. METHODS: The outcome of 149 transplant recipients with HEHE recorded in the European Liver Transplant Registry during the period November 1984 to May 2014 was analyzed. Median post-LT follow-up was 7.6 years (interquartile range, 2.8-14.4). RESULTS: Cox regression analysis showed that macrovascular invasion (hazard ratio [HR], 4.8; P < 0.001), pre-LT waiting time of 120 days or less (HR, 2.6; P = 0.01) and hilar lymph node invasion (HR = 2.2; P = 0.03), but not pre-LT extrahepatic disease, were significant risk factors for recurrence. These findings, which were also confirmed in a propensity score analysis, allowed the development of a HEHE-LT score enabling stratification of patients in relation to their risk of tumor recurrence. Patients with a score of 2 or less had a much better 5-year disease-free survival compared to those having a score of 6 or higher (93.9% vs 38.5%; P < 0.001). CONCLUSIONS: The analysis of this (largest in the world) HEHE adult liver recipient cohort clearly confirms the value of LT in the treatment of this rare disorder and also permits identification of patients at risk of posttransplant recurrence. Posttransplant follow-up should take the HEHE-LT score into account. Extrahepatic disease localization is reconfirmed not to be a contraindication for LT.

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