Epithelioid hemangioendothelioma, an ultra-rare cancer : a consensus paper from the community of experts - Stacchiotti, Silvia (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Miah, Aisha B. (The Royal Marsden Hospital) ; Frezza, Anna Maria (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Messiou, Christina (Department of Radiology. The Royal Marsden Hospital and The Institute of Cancer Research) ; Morosi, Carlo (Radiology Department. Fondazione IRCCS Istituto Nazionale Tumori) ; Caraceni, Augusto (Fondazione IRCCS Istituto Nazionale Tumori) ; Antonescu, Cristina (Memorial Sloan Kettering Cancer Center) ; Bajpai, Jyoti (Homi Bhabha National Institute. Medical Oncology Department) ; Baldini, Elizabeth Healey (Dana-Farber Cancer Center/Brigham) ; Bauer, Sebastian (University of Duisburg-Essen) ; Biagini, Roberto (Regina Elena National Cancer Institute) ; Bielack, Stefan S. (Klinikum Stuttgart - Olgahospital) ; Blay, Jean-Yves (Department of Medical Oncology. Centre Leon Berard. Université Claude Bernard Lyon. Unicancer) ; Bonvalot, Sylvie (Institut Curie. Department of Surgical Oncology) ; Boukovinas, Ioannis P. (Nordix) ; Bovee, Judith V.M.G. (Leiden University Medical Center) ; Boye, Kjetil (The Norwegian Radium Hospital) ; Brodowicz, Thomas (Medical University Vienna) ; Callegaro, Dario (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; De Álava, Enrique (Department of Normal and Pathological Cytology and Histology. School of Medicine. University of Seville) ; Deoras-Sutliff, M. (The EHE Foundation) ; Dufresne, Armelle (Department of Medical Oncology. Centre Leon Berard. Université Claude Bernard Lyon. Unicancer) ; Eriksson, Mikael (Department of Oncology. Skane University Hospital and Lund University) ; Errani, Costantino (Orthopaedic Service. Musculoskeletal Oncology Department. IRCCS Istituto Ortopedico Rizzoli) ; Fedenko, Alexander (Medical Oncology Division. P.A. Herzen Cancer Research Institute) ; Ferraresi, Virginia (Sarcomas and Rare Tumors Unit. IRCCS Regina Elena National Cancer Institute) ; Ferrari, Andrea (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Fletcher, Christopher D.M. (Department of Pathology Brigham & Women's Hospital) ; Garcia del Muro, Xavier (Universitat de Barcelona) ; Gelderblom, Hans J. (Department of Medical Oncology. Leiden University Medical Center) ; Gladdy, Rebecca A. (University of Toronto and Lunenfeld-Tanenbaum Research Institute) ; Gouin, François (Department of Surgery. Centre Leon Berard) ; Grignani, Giovanni (Candiolo Cancer Institute. FPO - IRCCS) ; Gutkovich, J. (NUY Langone Medical Center) ; Haas, Rick (Department of Radiotherapy. the Leiden University Medical Center) ; Hindi, Nadia (Universidad de Sevilla. Instituto de Biomedicina de Sevilla) ; Hohenberger, Peter (Mannheim University Medical Center) ; Huang, Paul (Division of Molecular Pathology. The Institute of Cancer Research) ; Joensuu, Heikki T. (Department of Oncology. Helsinki University Hospital & Helsinki University) ; Jones, Robin Lewis (Department of Cancer. The Royal Marsden Hospital and The Institute of Cancer Research) ; Jungels, Christiane (Institut Jules Bordet. Université Libre de Bruxelles) ; Kasper, Bernd (University of Heidelberg. Mannheim University Medical Center. Sarcoma Unit) ; Kawai, Akira (Musculoskeletal Oncology and Rehabilitation Medicine. Rare Cancer Center National Cancer Center Hospital) ; Le Cesne, Axel (International Department. Gustave Roussy) ; Le Grange, Franél (UCLH - University College London Hospitals NHS Foundation Trust) ; Leithner, Andeas (Department of Orthopaedics and Trauma Medical University Graz) ; Leonard, H. (Chair of Trustees of the EHE Rare Cancer Charity (UK). Charity number 1162472) ; López Pousa, Antonio (Institut d'Investigació Biomèdica Sant Pau) ; Martin Broto, Javier (Hospital Universitario Fundación Jiménez Díaz) ; Merimsky, Ofer (Unit of Soft Tissue and Bone Oncology. Division of Oncology. Tel-Aviv Medical Center affiliated with Sackler School of Medicine. Tel Aviv University) ; Merriam, Priscilla (Dana-Farber Cancer Institute (Boston, Estats Units d'Amèrica). Department of Medical Oncology) ; Miceli, Rosalba (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Mir, Olivier (Sarcoma Group. Gustave Roussy) ; Molinari, Massimo (University of Pittsburgh Medical Center. Thomas Starzl Transplant Institute) ; Montemurro, Michael (Oncology. CHUV Lausanne) ; Oldani, Graziano (Division of Abdominal Surgery. University Hospitals of Geneva) ; Palmerini, Emanuela (Chemotherapy Unit. IRCCS Istituto Ortopedico Rizzoli) ; Pantaleo, Maria Abbondanza. (Division of Oncology. IRCCS Azienda Ospedaliero-Universitaria di Bologna) ; Patel, Sapna Pradyuman (Sarcoma Center. The University of Texas M.D. Anderson Cancer Center) ; Piperno-Neumann, Sophie (Department of Medical Oncology. Institut Curie) ; Raut, Chandrajit Premanand (Dana Farber Cancer Center. Harvard Medical School) ; Ravi, Vinod (Sarcoma Center. The University of Texas M.D. Anderson Cancer Center) ; Razak, Albiruni Ryan Abdul (Princess Margaret Cancer Centre and Sinai Healthcare System & Faculty of Medicine. University of Toronto) ; Reichardt, Peter (Helios Klinikum Berlin-Buch. Department of Oncology and Palliative Care) ; Rubin, Brian P. (Robert J. Tomsich Pathology and Laboratory Medicine Institute. Cleveland Clinic) ; Rutkowski, Piotr (Maria Sklodowska-Curie National Research Institute of Oncology. Department of Soft Tissue/Bone Sarcoma and Melanoma) ; Safwat, Akmal Ahmed (Aarhus University Hospital (Aarhus, Dinamarca)) ; Sangalli, Claudia (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Sapisochin, Gonzalo (Multi-Organ Transplant and HPB Surgical Oncology. Division of General Surgery. Department of Surgery. University of Toronto) ; Sbaraglia, Marta (Department of Pathology. Azienda Ospedaliera Università Padova) ; Scheipl, Susanne (Department of Orthopaedics and Trauma. Medical University of Graz) ; Schöffski, Patrick (Leuven Cancer Institute) ; Strauss, Dirk Cornelius (Department of Surgery. The Royal Marsden Hospital and The Institute of Cancer Research) ; Strauss, Sandra J. (University College London Hospital) ; Sundby Hall, Kirsten (Department of Oncology. Oslo University Hospital. The Norwegian Radium Hospital) ; Tap, William D. (Department of Medicine. Memorial Sloan Kettering Cancer Center and Weill Cornell Medical College) ; Trama, Annalisa (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Tweddle, A. (Palliative Care. The Royal Marsden Hospital and The Institute of Cancer Research London) ; van der Graaf, Winette T.A. (The Netherlands Cancer Institute (Amsterdam, Països Baixos)) ; van de Sande, Michiel (Department of Orthopedic Surgery Bone and Soft Tissue Tumor Unit. Leiden University Medical Center) ; Van Houdt, Winan (Sarcoma and Melanoma Unit. The Netherlands Cancer Institute) ; van Oortmerssen, Gerard (Co-Chair of Sarcoma Patients EuroNet (SPAEN). Woelfersheim. Germany & Chairman of the Dutch organisation for sarcoma patients (Patiëntenplatform Sarcomen). Guest researcher at Leiden University (Leiden Institute for Advanced Computer Science). Leiden University) ; Wagner, Andrew J. (Dana-Farber Cancer Institute (Boston, Estats Units d'Amèrica). Department of Medical Oncology) ; Wartenberg, Markus (Chair of the Board of Directors of Sarcoma Patients EuroNet (SPAEN). Sarcoma Patients EuroNet (SPAEN)) ; Wood, J. (The Royal Marsden NHS Foundation Trust) ; Zaffaroni, Nadia (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Zimmermann, Camilla (Department of Supportive Care. Princess Margaret Cancer Centre and Division of Palliative Medicine. Department of Medicine. University of Toronto) ; Casali, Paolo Giovanni (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia)) ; Dei Tos, Angelo (Department of Pathology. Azienda Ospedaliera Università Padova) ; Gronchi, Alessandro (Fondazione IRCCS Istituto Nazionale dei Tumori (Milà, Itàlia))