1. Department of Hematology and Oncology University Children's Hospital Tübingen Tübingen Germany
2. Department of Neurosurgery, Section of Pediatric Neurosurgery University Hospital Tübingen Tübingen Germany
3. Department of Pediatric Hematology and Oncology University Medical Center Hamburg‐Eppendorf Hamburg Germany
4. Department of Neuropediatrics and Developmental Neurology University Hospital Tübingen Tübingen Germany
5. Institute of Pathology, Department of Neuropathology University Hospital Tübingen Tübingen Germany
6. Department of Neuroradiology University Hospital Tübingen Tübingen Germany