Clinical trial Recruiting at 53 sites Observational Ages 18 to 70

Collecting data to improve liver transplantation predictions

Official title: Data Collection to Design and Validate LEOPARD Predictive Models of Delisting in Liver Transplant Candidates

Run by Assistance Publique - Hôpitaux de Paris · NCT06675604 · Data updated 2026-11-12

This study is trying to use AI to better predict which liver transplant candidates are at risk of dropping out of the waitlist, so that more people can get fair access to transplants across Europe.

Quick facts

Study typeObservational
Ages18 Years to 70 Years
SexAll
Enrollment4500 (estimated)
SponsorAssistance Publique - Hôpitaux de Paris
Academic / other
Locations53 sites (Vienna and 52 other locations)
StatusRecruiting
StartedFebruary 4, 2025
Main results expectedMarch 2028
Study endsFebruary 4, 2029
Registry record updatedJuly 29, 2026
Trial IDNCT06675604 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 to 70 who are listed for liver transplantation due to decompensated cirrhosis, other chronic end-stage liver diseases, or hepatocellular carcinoma.

Probably not a fit

Patients who are not listed for liver transplantation or those outside the specified age range may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study is part of the LEOPARD European project aimed at developing and validating new predictive models for mortality among liver transplantation candidates. The study addresses the limitations of current MELD-based allocation systems, which have become less accurate in predicting mortality and dropout rates on the waitlist. By utilizing AI and machine learning, the project seeks to identify patients at the highest risk of dropout, thereby improving equity in access to liver transplantation across Europe. Data will be collected from various European centers to support the development of these predictive models.

Why it matters

Potential benefit: If successful, this study could lead to more accurate predictions for liver transplantation candidates, ultimately improving patient outcomes and access to transplants.

How similar studies have gone: Other studies have shown success in using predictive modeling for liver transplantation, but this approach aims to enhance existing methods with advanced AI techniques.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adult \[age 18;70\] patients listed for:

  * decompensated cirrhosis as primary diagnosis, irrespective of liver disease etiology (subset 1) OR
  * other chronic end-stage liver diseases requiring LT, to be listed under a MELD-based allocation system (examples: primary biliary cholangitis, primary sclerosing cholangitis etc…) (subset 2) OR
  * HCC\* as primary diagnosis, whatever the etiology of the underlying liver disease with or without underlying cirrhosis (subset 3). (HCC diagnosed on Barcelona/EASL criteria or histologically proven. HCC meeting or not Milan criteria, as per center practice.)
* Patients registered on national waiting lists under the MELD offering schemes, regardless of extra MELD points and MELD exceptions are affected or not.
* Patient (or trusted person, family member or close relation, if the patient is unable to be informed) who has been informed and did not express opposition to data collection

(\*Of note, enrolment of patients with T1 tumors (1 single tumor \< 2 cm diameter) not amenable to loco-regional therapies because of decompensation, and prioritized under the MELD system, will be allowed in Subset 1.)

Exclusion Criteria:

* Tumor vascular invasion (portal or hepatic veins) evidenced by imaging at pre transplantation work-up, including portal vein thrombosis stage 1
* Extra-hepatic metastasis of HCC, as assessed by sectional imaging, functional imaging (18 FDG PET CT/MRI) or histologically proven
* Patients who are under safeguard of justice or tutorship or curatorship
* Patient on AME (state medical aid)
* Participation to LEOPARD PVC 1 study of WP2

Where it's running

  • Universitätsklinik für Allgemeinchirurgie, Klinische Abteilung für Transplantation
    Vienna, Austria
    Recruiting
  • Hôpital Erasme Université Libre de Bruxelles
    Brussels, Belgium
    Recruiting
  • Department of Gastroenterology and Hepatology Universitair Ziekenhuis Gent
    Ghent, Belgium
    Recruiting
  • Cliniques Universitaires Saint-Luc (UCLouvain)
    Leuven, Belgium
    Recruiting
  • UZ Leuven
    Leuven, Belgium
    Recruiting
  • CHU Liège
    Liège, Belgium
    Recruiting
Show 44 more locations
  • CHU Jean Minjoz Besançon, Department of Hepatology
    Besançon, France
    Recruiting
  • CHU Trousseau Tours, Department of Hepatology
    Chambray-lès-Tours, France
    Recruiting
  • CHU Beaujon, Department of Hepatology
    Clichy, France
    Recruiting
  • Hospital Henri Mondor, Department of Hepatology
    Créteil, France
    Recruiting
  • CHU Dijon, Department of Hepatology
    Dijon, France
    Recruiting
  • CHRU Huriez Lille, Department of Hepatology
    Lille, France
    Recruiting
  • CHU Lyon Croix Rousse, Department of Hepatology
    Lyon, France
    Recruiting
  • CHU La Timone AP-HM, Department of Hepatology
    Marseille, France
    Recruiting
  • CHRU Montpellier Saint Eloi, Department of Hepatology
    Montpellier, France
    Recruiting
  • CHU L'Archet Nice, Department of Hepatology
    Nice, France
    Recruiting
  • CHU La Pitié Salpêtrière, Department of Hepatology
    Paris, France
    Recruiting
  • CHU Bordeaux Haut Levêque, Department of Hepatology
    Pessac, France
    Recruiting
  • CHU Pontchaillou Rennes, Department of Hepatology
    Rennes, France
    Recruiting
  • CHRU Strasbourg, Chirurgie Hepato-bilio-pancreatique et transplantation hepatique Department
    Strasbourg, France
    Recruiting
  • CHU Purpan Toulouse, Department of Hepatology
    Toulouse, France
    Recruiting
  • CHU Paul Brousse, Department of Hepatology
    Villejuif, France
    Recruiting
  • Department for General, Visceral, Pediatric and Transplant Surgery, Universitätsklinikum Aachen
    Aachen, Germany
    Recruiting
  • Charité - Universitätsmedizin Berlin
    Berlin, Germany
    Recruiting
  • Gastroenterology, Hepatology, Infectious Diseases and Endocrinology (GHIE) Medizinische Hochschule Hannover
    Hanover, Germany
    Recruiting
  • Universitätsklinikum Jena
    Jena, Germany
    Recruiting
  • Universitätsklinikum Schleswig - Holstein | UKSH · Transplantation Medicine
    Kiel, Germany
    Recruiting
  • Universität Leipzig
    Leipzig, Germany
    Recruiting
  • Klinik für Allgemein-, Viszeral- und Transplantationschirurgie, Universitätsklinikum Münster
    Münster, Germany
    Recruiting
  • Klinik für Allgemeine, Viszeral- und Transplantationschirurgie, Universitätsklinikum Tübingen
    Tübingen, Germany
    Recruiting
  • Universitätsklinikum Würzburg
    Würzburg, Germany
    Recruiting
  • Università Politecnica delle Marche
    Ancona, Italy
    Recruiting
  • Aou Policlinico di Bari
    Bari, Italy
    Recruiting
  • Hepatobiliary Surgery and Transplant Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna
    Bologna, Italy
    Recruiting
  • Ospedale Policlinico San Martino
    Genova, Italy
    Recruiting
  • Division of General Surgery & Abdominal Transplantation, Asst Grande Ospedale Metropolitano Niguarda
    Milan, Italy
    Recruiting
  • Fondazione IRCCS Istituto Nazionale dei Tumori
    Milan, Italy
    Recruiting
  • Hepato-Pancreato-Biliary Surgery and Liver Transplantation, Azienda Ospedaliero Universitaria Policlinico di Modena
    Modena, Italy
    Recruiting
  • Azienda Ospedaliera di Rilievo Nazionale A. Cardarelli
    Naples, Italy
    Recruiting
  • Azienda Ospedale - Università Padova
    Padova, Italy
    Recruiting
  • Gastroenterology department, Istituto Mediterraneo per i Trapianti Ismett IRCCS
    Palermo, Italy
    Recruiting
  • Hepatobiliary Surgery and Liver Transplantation, Azienda Ospedaliero Universitaria Pisana (Via Paradisa)
    Pisa, Italy
    Recruiting
  • Azienda Ospedaliero Universitaria Policlinico Umberto I di Roma
    Roma, Italy
    Recruiting
  • Hospital tor Vergata Roma
    Roma, Italy
    Recruiting
  • Azienda Ospedaliera San Camillo-Forlanini
    Rome, Italy
    Recruiting
  • Dipartimento di chirurgia generale e specialistica e dei trapianti, Università degli Studi di Torino
    Torino, Italy
    Recruiting
  • Università Degli Studi di Udine
    Udine, Italy
    Recruiting
  • Liver Transplant Unit, Surgery and Oncology, University of Verona
    Verona, Italy
    Recruiting
  • Center for Liver Tumors Leiden of the Leiden University Medical Center (LUMC)
    Leiden, Netherlands
    Recruiting
  • Gastroenterology and Hepatology, Rotterdam Erasmus Medical Center
    Rotterdam, Netherlands
    Recruiting

+3 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • LEOPARD: Predicting liver transplant dropout with AI in European patients

    This project tests new AI-based models to predict which liver transplant candidates are at highest risk of dropout or death while on the waitlist.

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  • Austrian PBC Registry

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  • Combining IV immunotherapy with liver-directed procedures to downstage hepatocellular carcinoma

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  • Biochemical response and health outcomes in people with primary biliary cholangitis

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  • Saroglitazar Magnesium for PBC with incomplete UDCA response or intolerance

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.