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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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Tumor region associated with specific processing speed outcomes.

Rachel K Peterson1,2, Rowena Ng1,2, Natasha N Ludwig1,2

  • 1Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, Maryland, USA.

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|January 10, 2023
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Summary
This summary is machine-generated.

Pediatric brain tumor survivors show processing speed deficits across multiple cognitive tasks, not just motor skills. Tumor location impacts oral naming speed, with infratentorial tumors linked to slower performance.

Keywords:
cancercerebelluminfratentorialoncologypediatric

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Area of Science:

  • Neuroscience
  • Pediatric Oncology
  • Cognitive Psychology

Background:

  • Processing speed (PS) is frequently impaired in pediatric cancer survivors due to treatment and tumor location.
  • Conventional studies focus on graphomotor PS, but emerging research suggests broader impacts on cognitive speed.
  • Understanding the full spectrum of PS deficits and their relationship to tumor characteristics is crucial for targeted interventions.

Purpose of the Study:

  • To investigate various aspects of processing speed (PS) in pediatric brain tumor survivors.
  • To determine which specific PS domains are impaired in this population.
  • To explore the influence of tumor location (infratentorial vs. supratentorial) on PS deficits.

Main Methods:

  • Assessed PS (oral naming, semantic/phonemic fluency, motor speed, graphomotor speed, visual scanning) in 167 pediatric brain tumor patients using clinical neuropsychological tests.
  • Matched infratentorial and supratentorial groups on age, time since diagnosis, and neuropsychological assessment for regional analysis.
  • Analyzed performance against normative data and examined the impact of brain region on PS outcomes.

Main Results:

  • The entire sample performed below average on oral naming, phonemic fluency, motor speed, visual scanning, and graphomotor speed.
  • Oral naming speed was significantly slower in patients with infratentorial tumors compared to supratentorial tumors.
  • Brain region remained a significant predictor of PS performance after controlling for medical and demographic factors.
  • Higher rates of impairment were observed across most PS measures for infratentorial tumors, except phonemic fluency.

Conclusions:

  • Pediatric brain tumor survivors exhibit widespread processing speed impairments, extending beyond peripheral motor slowing.
  • Tumor location is a significant factor influencing specific neuropsychological outcomes, including oral naming speed.
  • These findings highlight the complex cognitive sequelae of pediatric brain tumors and the need for region-specific considerations in assessment and rehabilitation.