Neurofibromatosis type 1 with comorbid optic pathway glioma does not confer additional cognitive sequelae
Rachel K Peterson1,2, Rowena Ng1,2
1Center for Neuropsychological and Psychological Assessment, Kennedy Krieger Institute, Baltimore, Maryland, USA.
Summary
Optic pathway gliomas (OPGs) do not worsen cognitive deficits in children with neurofibromatosis type 1 (NF1). Cognitive impairments in NF1 are linked to the NF1 genotype, not additional tumor burden.
Area of Science:
- Neuroscience
- Pediatric Oncology
- Genetics
Background:
- Neurofibromatosis type 1 (NF1) is associated with cognitive impairments in children.
- Optic pathway gliomas (OPGs) are common in NF1, but their impact on cognition beyond the NF1 genotype is unclear.
Purpose of the Study:
- To compare cognitive function in children with NF1 and OPG, NF1 without OPG, and children with CNS tumors of the visual system without NF1.
- To determine if OPG exacerbates cognitive vulnerabilities in children with NF1.
Main Methods:
- Retrospective cohort study of 98 pediatric patients.
- Evaluated intellectual functioning, verbal reasoning, visuospatial reasoning, working memory, and processing speed.
- Used ANOVA and chi-square tests to analyze group differences and impairment rates.
Main Results:
- Children with NF1 (with or without OPG) showed similar cognitive performance.
- Both NF1 groups had weaker verbal and visuospatial reasoning than the CNS-V tumor group.
- Children with CNS-V tumors performed in the average range, with significantly better intellectual performance than NF1 groups.
Conclusions:
- OPG does not appear to worsen cognitive deficits in children with NF1.
- Cognitive weaknesses in NF1 are likely due to the genotype, not tumor burden.
- Children with non-NF1 visual system tumors showed average cognitive performance, highlighting the need for continued monitoring in NF1.
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