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Journal of Neuro-Oncology

, Volume 133, Issue 2, pp 429–434 | Cite as

Chemoradiation impairs normal developmental cortical thinning in medulloblastoma

  • Palak Kundu
  • Matthew D. Li
  • Ben Y. Durkee
  • Susan M. Hiniker
  • Karl Bush
  • Rie von Eyben
  • Michelle L. Monje
  • Kristen W. Yeom
  • Sarah S. Donaldson
  • Iris C. GibbsEmail author
Clinical Study

Abstract

Medulloblastoma patients are treated with surgery, radiation and chemotherapy. Radiation dose to the temporal lobe may be associated with neurocognitive sequelae. Longitudinal changes of temporal lobe cortical thickness may result from neurodevelopmental processes such as synaptic pruning. This study applies longitudinal image analysis to compare developmental change in cortical thickness in medulloblastoma (MB) patients who were treated by combined modality therapy to that of cerebellar juvenile pilocytic astrocytoma (JPA) patients who were treated by surgery alone. We hypothesized that the rates of developmental change in cortical thickness would differ between these two groups. This retrospective cohort study assessed changes in cortical thickness over time between MB and JPA patients. High-resolution magnetic resonance (MR) images of 14 MB and 7 JPA subjects were processed to measure cortical thickness of bilateral temporal lobe substructures. A linear mixed effects model was used to identify differences in substructure longitudinal changes in cortical thickness. The left temporal lobe exhibited overall increased cortical thickness in MB patients relative to JPA patients who showed overall cortical thinning (mean annual cortical thickness change: MB 0.14 mm/year versus JPA −0.018 mm/year across all substructures), particularly in the inferior temporal lobe substructures (p < 0.0001). The cortical thickness change of the right temporal lobe substructures exhibited similar, though attenuated trends (p = 0.002). MB patients exhibit overall increased cortical thickness rather than cortical thinning as seen in JPA patients and as expected in normal cortical development. These observations are possibly due to chemoradiation induced-disruption of normal neuronal mechanisms. Longitudinal image analysis may identify early biomarkers for neurocognitive function with routine imaging.

Keywords

Medulloblastoma Chemoradiation Neurocognitive Cortical thinning 

Notes

Compliance with ethical standards

Conflict of interest

No conflict of interest to disclose.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Palak Kundu
    • 1
  • Matthew D. Li
    • 2
  • Ben Y. Durkee
    • 1
  • Susan M. Hiniker
    • 1
  • Karl Bush
    • 1
  • Rie von Eyben
    • 1
  • Michelle L. Monje
    • 3
  • Kristen W. Yeom
    • 2
  • Sarah S. Donaldson
    • 1
  • Iris C. Gibbs
    • 1
    Email author
  1. 1.Department of Radiation OncologyStanford University School of MedicineStanfordUSA
  2. 2.Division of Pediatric Radiology, Department of RadiologyStanford University School of MedicineStanfordUSA
  3. 3.Division of Child Neurology, Department of Neurology and Neurological SciencesStanford University School of MedicineStanfordUSA

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