https://onlinelibrary.wiley.com/doi/epdf/10.1002/pbc.24997 Rare Malignant Pediatric Tumors Registered in the German Childhood Cancer Registry 2001–2010 Background. The German Childhood Cancer Registry (GCCR) annually registers approximately 2,000 children diagnosed with a malignant disease (completeness of registration >95%). While most pediatric cancer patients are diagnosed and treated according to standardized cooperative protocols of the German Society for Pediatric Oncology and Hematology (GPOH), patients with rare tumors are at risk of not being integrated in the network including trialsandreferencecenters.Procedure.Aretrospectiveanalysisofall rare extracranial solid tumors reported to the GCCR 2001–2010(age 95%). While most pediatric cancer patients are diagnosed and treated according to standardized cooperative protocols of the German Society for Pediatric Oncology and Hematology (GPOH), patients with rare tumors are at risk of not being integrated in the network includ...