Ordinary Members
| Stefano Chiaravalli | Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy | Italian national cooperative study TREP (Tumori Rari in Età Pediatrica, Rare Tumors in Pediatric Age) |
| Bernadette Brennan | Royal Manchester Children’s Hospital, United Kingdom | United Kingdom’s Children’s Cancer & Leukaemia Group (UKCCLG) |
| Teresa Stachowicz-Stencel | Department of Pediatrics, Hematology and Oncology Medical University, Gdansk, Poland | Polish Rare Pediatric Tumor Study Group (PPRSTG) |
| Giovanni Cecchetto | Pediatric Surgery, Department of Pediatrics, Padova University Hospital, Italy | Italian national cooperative study TREP (Tumori Rari in Età Pediatrica, Rare Tumors in Pediatric Age) |
| Rodica Voichita COSNAROVICI | Oncology Institute ”Prof.dr.Ion Chiricuta” Cluj-Napoca, Romania | SROHP: Romanian Society of Pediatric Onco-Hematology |
| Monica Désirée Dragomir | Institute of Oncology, Bucarest | SROHP: Romanian Society of Pediatric Onco-Hematology |
| Ricardo Lopez Almaraz | University Hospital of Cruces, Barakaldo-Bizkaia | Spanish Society of Pediatric Hematology and Oncology (SEHOP) |
| Apostolos Pourtsidis | Hellenic Society Pediatric Haematology Oncology | Hellenic Society Pediatric Haematology Oncology |
| Gustaf Osterlundh | Sahlgrenska University Hospital, Goteborg | Sweden |
| Maja Cesen/Marko Kavčič | University Medical Centre, Ljubljana | Slovenia |
| Alexandra Kolenova | University Children Hospital, Bratislava | Slovakia |
| Jelena Rascon | University Hospital Santariskiu Klinikos, Vilnius | Lithuania |
| Kata Martinova | University Children’s Hospital, Skopje | Macedonia |
| Dragana Janic | University Children Hospital, Belgrade | Serbia |
| Malgorzata KRAWCZYK | Department of Pediatrics, Hematology and Oncology Medical University, Gdansk, Poland | Polish Rare Pediatric Tumor Study Group (PPRSTG) |
| AnnaSYNAKIEWICZ | Department of Pediatrics, Hematology and Oncology Medical University, Gdansk, Poland | Polish Rare Pediatric Tumor Study Group (PPRSTG) |
| Michael Ost | UNIVERSITÄTSKLINIKUM TÜBINGEN | |
| Sabine Sarnacki | Necker Enfants Malades Hospital | French Group on Rare Tumors in Children (FRaCTurE; Groupe FRAnCais des TUmeurs Rares de l’Enfant) |
| Brice Fresneau | Department of pediatric oncology, GUSTAVE ROUSSY | French Group on Rare Tumors in Children (FRaCTurE; Groupe FRAnCais des TUmeurs Rares de l’Enfant) |
| Martin Ebinger | Pediatric Hematology and Oncology, University Children’s HospitalTübingen, Germany | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Kontny, Udo | Aaden, Germany | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Hippert Felicitas | Klinikum Dortmund, Kinderklinik | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Peter Vorwerk | Magdeburg | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Samuele Naviglio | Pediatric Hematology-Oncology, Institute for Maternal and ChildHealth IRCCS “Burlo Garofolo”, Trieste, Italy | Italy |
| Terwisscha van Scheltinga | Prinsesmaxima Centrum | The Netherlands |
| Bajciova Viera | BRNO | The Czech Republic |
| Miranda Dierselhuis | Prinsesmaxima Centrum | The Netherlands |
| Monika Sparber-Sauer | Klinikum Stuttgart, Olgahospital | Cooperative Weichteilsarkomstudiengruppe (CWS) |
| Sam Behjati | Wellcome Sanger Institute, UK Cambridge University Hospitals NHSFoundation Trust, UK | CCLG |
| Luca Bergamaschi | Istituto Nazionale Tumori Milano | TREP |
| Konrad Haug | Pediatric Hematology and Oncology, University Children’s HospitalTübingen, Germany | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Kuhlen Michaela | Augsburg, Germany | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |
| Hans Christiansen | Hannover, Germany | German Rare Tumor Committee (STEP; Seltene Tumoren in der Pädiatrie) |