1. Laboratory of Solid Tumors GeneticsInstitute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR 7284/INSERM U1081, Université Côte d'Azur (UCA), Centre Hospitalier Universitaire de Nice, Faculté de Médecine Nice France
2. Central Laboratory of PathologyNice University Hospital, Hôpital Pasteur Nice France
3. Department of Pediatric Onco‐hematologyNice University Hospital, Hôpital Archet 2 Nice France
4. Department of Pediatric SurgeryHôpital Lenval Nice France
5. Department of Pediatric RadiologyHôpital Lenval Nice France