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Updated: Jan 19, 2026

Establishment of Orthotopic Patient-derived Xenograft Models for Brain Tumors using a Stereotaxic Device
Published on: May 2, 2025
Survival of infants ≤24 months of age with brain tumors: A population-based study using the SEER database
Claire Faltermeier1, Timothy Chai2, Sharjeel Syed2
1Department of Neurosurgery, University of California, San Francisco, CA, United States of America.
Insights
Survival for infant brain tumors has improved since the 1970s, but not for all types. Updated prognostication is needed for these pediatric brain tumors, considering changes in treatment and outcomes.
Area of Science:
- Pediatric oncology
- Neuro-oncology
- Epidemiology
Background:
- Infant brain tumors are the most common solid malignancy and leading cause of cancer-related death in children.
- Existing epidemiological data is limited by small case numbers.
- This study provides updated prognostication using population-based data.
Purpose of the Study:
- To analyze survival trends for infant brain tumors.
- To update prognostication based on contemporary and historical data.
- To identify changes in management and outcomes over time.
Main Methods:
- Population-based cohort analysis using the Surveillance, Epidemiology and End Results (SEER) database.
- Inclusion of infants diagnosed with brain tumors between 1973 and 2013.
- Stratification of survival rates by tumor type and decade, analyzing management trends.
Main Results:
- Survival improved for most infant brain tumor types, excluding embryonal and choroid plexus tumors.
- Ependymal tumors showed the most significant survival improvement, with 5-year survival increasing from 28% to 77% between the 1980s and 2000s.
- Radiation use declined overall but increased for embryonal and ependymal tumors after 2000.
Conclusions:
- Overall survival for infant brain tumors has improved, but not uniformly across all types.
- Prognostication for infants with brain tumors requires updating due to evolving management and survival rates.
Introduction:
Brain tumors are the most common solid malignancy and leading cause of cancer-related deaths in infants. Current epidemiological data is limited by low numbers of reported cases. This study used a population-based approach with analysis of contemporary and historical survival curves to provide up-to-date prognostication.
Methods:
Observational cohort analysis was performed using the Surveillance, Epidemiology and End Results (SEER) database. Infants with brain tumors diagnosed from 1973 to 2013 were categorized by the most common tumor types (diffuse astrocytic and oligodendroglioma, choroid plexus, embryonal, ependymal, medulloblastoma and pilocytic astrocytoma). The 1, 5 and 10 year survival was stratified by decade, with trends in management and outcomes analyzed.
Results:
We identified 2996 affected infants satisfying inclusion criteria. All tumor types, except embryonal and choroid plexus, demonstrated improving survival with time. Infants with embryonal tumors showed a decline in survival from the 1970s to 1990s (p = 0.009), whereas infants with choroid plexus tumors had no change in survival. Infants with ependymal tumors experienced the greatest improvement in survival from 1980s to 1990s and 1990s to 2000s (p = 0.0001, p = 0.01), with 5-year survival probability improving from 28% (95% CI 15-42%) in the 1980s to 77% (95% CI 69-83%) the 2000s. The use of radiation declined from 1970 to 2000 for all tumors; however, radiation treatment for embryonal and ependymal subtypes increased after 2000.
Conclusions:
While overall survival for infants with brain tumors has improved from the 1970s onwards, not every tumor type has seen a statistically significant change. Given changes in management and survival, prognostication of infants with brain tumor should be updated.
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