1. Department of Pediatric Oncology, Children's Cancer Hospital Egypt 57357, Cairo 11617, Egypt
2. Department of Pathology, National Cancer Institute, Cairo University, Cairo 11796, Egypt
3. Department of Radiodiagnosis, National Cancer Institute, Cairo University, Cairo 11796, Egypt
4. Department of Research, Children's Cancer Hospital Egypt 57357, Cairo 11617, Egypt
5. Department of Neurosurgery, Kasr Al‑Ainy School of Medicine, Cairo University, Cairo 11796, Egypt
6. Department of Pediatric Oncology, National Cancer Institute, Cairo University, Cairo 11796, Egypt