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Intracranial gliomas in neurofibromatosis type 1
R Listernick1, J Charrow, D H Gutmann
1Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA.
American Journal of Medical Genetics
|September 1, 1999
Summary
Neurofibromatosis type 1 (NF1) associated optic pathway gliomas are typically benign. Most children with NF1 and optic pathway tumors do not require intervention, making routine screening unnecessary.
Area of Science:
- Neuro-oncology
- Genetics
- Ophthalmology
Background:
- Optic pathway gliomas (OPGs) and brainstem gliomas are common intracranial neoplasms in neurofibromatosis type 1 (NF1).
- Previous studies were limited by diagnostic inaccuracies, lack of advanced neuroimaging, and overtreatment.
- Systematic study reveals OPGs in NF1 are more benign than in non-NF1 patients.
Purpose of the Study:
- To characterize the natural history of optic pathway gliomas in children with neurofibromatosis type 1.
- To determine the necessity of routine screening and intervention for OPGs in NF1.
Main Methods:
- Review of systematic studies on optic pathway gliomas in NF1 patients.
- Analysis of tumor behavior, progression, and need for intervention.
- Evaluation of diagnostic and therapeutic challenges in historical studies.
Main Results:
- Optic pathway gliomas in NF1 patients exhibit a more benign clinical course compared to non-NF1 counterparts.
- While 50% of cases may present with symptoms, progression requiring intervention is uncommon.
- Screening neuroimaging for asymptomatic NF1 patients with OPGs is not warranted.
Conclusions:
- Optic pathway tumors in NF1 are generally indolent and rarely necessitate aggressive treatment.
- Yearly ophthalmologic evaluations and growth assessments are recommended for children under 7 with NF1.
- Focus should be on monitoring for symptoms and precocious puberty rather than routine neuroimaging.