Rhabdomyosarcoma with unknown primary tumor site. A report from European Pediatric Soft Tissue Sarcoma Study Group (EpSSG)
M.C. Affinita MD1, J.H.M Merks MD, PhD2, J. C. Chisholm MD, PhD3, S. Haouy MD4, A.  Rome MD5, M. Rabusin MD6, B. Brennan MD, PhD7, G. Bisogno MD, PhD1
1 Pediatric Hematology, Oncology and Stem Cell Transplant Division. Department of Women’s and Children’s Health University Hospital of Padova, Padova Italy
2 Princess Máxima Center for Pediatric Oncology, Utrecht, Netherlands
3 Children and Young People’s Unit, The Royal Marsden NHS Foundation Trust and Institute of Cancer Research, Sutton, United Kingdom
4 Department of Pediatric Oncology, Montpellier University Hospital Centre, Montpellier, France.
5 Department of Pediatric Immunology, Hematology and Oncology, Children’s Hospital of La Timone, AP-HM, Marseille, France
6 Department of Pediatric, Hemato-Oncology Unit, IRCCS Burlo Garofolo, Trieste, Ita
7 Pediatric Oncology, Royal Manchester Children’s Hospital, Manchester, UK.