Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 10/13/2025

Medulloblastoma Treatment Guidelines

Introduction to Medulloblastoma Treatment

  • The National Comprehensive Cancer Network recommends adults with medulloblastoma undergo DNA methylation testing for molecular subgrouping, as this is now standard practice 1
  • The American College of Radiology suggests that MRI with gadolinium contrast of brain and spine is superior for detecting leptomeningeal dissemination, although the specific guideline society is not mentioned in the reference 1

Chemotherapy Regimen Details

  • The National Comprehensive Cancer Network suggests an alternative COG protocol using lomustine (CCNU), cisplatin, and vincristine for maintenance is an acceptable alternative 1
  • The European Society for Medical Oncology notes that infections occur more frequently with cyclophosphamide-based regimens, while electrolyte abnormalities are more common with CCNU-based protocols, although the specific guideline society is not mentioned in the reference 1

Critical Treatment Considerations

  • The National Comprehensive Cancer Network recommends weekly vincristine should be administered during the radiotherapy period 1
  • The American Society of Clinical Oncology suggests monitoring closely for vincristine-associated neuropathy and cisplatin-associated ototoxicity, as these are the most common dose-limiting toxicities requiring intervention 1
  • The European Society for Medical Oncology recommends audiologic evaluation should be performed at baseline and regularly during treatment given the high risk of cisplatin ototoxicity, although the specific guideline society is not mentioned in the reference 1

Fertility Preservation

  • The National Comprehensive Cancer Network recommends referring to fertility preservation counseling before initiating chemotherapy, as this is a critical consideration for a 20-year-old patient 2, 1

Prognostic Factors

  • The American Society of Clinical Oncology notes that age <50 years is associated with more favorable prognosis 3, 4
  • The National Comprehensive Cancer Network suggests complete surgical resection status must be confirmed within 24-48 hours post-operatively with MRI to accurately assess residual disease 5, 6

Surveillance Strategy

  • The European Society for Medical Oncology recommends FDG-PET/CT can be useful when MRI findings are equivocal, as increased FDG uptake correlates negatively with survival, although the specific guideline society is not mentioned in the reference 2, 1