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Optic pathway glioma and the sex association in neurofibromatosis type 1: a single-center study
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Optic pathway glioma and the sex association in neurofibromatosis type 1: a single-center study
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Journal Article
Optic pathway glioma and the sex association in neurofibromatosis type 1: a single-center study
2021
Overview
Background
Low-grade optic pathway glioma (OPG) develops in 15–20% of children with neurofibromatosis type 1 (NF1). OPGs are symptomatic in 30–50% and one-third of these require treatment. A few studies have suggested female sex as a risk factor for visual impairment associated with NF1-OPG. This descriptive study investigated the correlation between NF1-OPG growth, sex and visual impairment.
Method
We based our cross-sectional study on a systematic, retrospective data collection in a NF1 cohort of children and adolescents below 21 years of age followed at Center for Rare Diseases, Aarhus University Hospital, Denmark. For each patient with OPG a medical chart review was performed including demographics, ophthalmological examinations and magnetic resonance imaging (MRI) of OPG.
Results
Of 176 patients with NF1 (85 females, 91 males), we identified 21 patients with OPG (11.9%) with a preponderance of females,
p
=
0.184
. Eight females (62%) and one male (13%) had visual impairment at the last ophthalmological evaluation. Five out of 21 children with OPG (24%) underwent diagnostic MRI because of clinical findings at the ophthalmological screening. Nine children (43%) had symptoms suggestive of OPG and seven (33%) experienced no OPG-related symptoms before the diagnostic MRI. Of eight children diagnosed with OPG ≤ two years of age, one had visual impairment. Of 13 children diagnosed > two years of age, eight had visual impairment
;
in each group, four of the children were treated with chemotherapy. The study suggested no correlation between NF1-OPG growth and sex.
Conclusion
Our data suggest sex as a risk factor for visual impairment, while an OPG diagnose ≤ two years of age was a protective factor for visual impairment. Females with NF1-OPG had a higher prevalence of visual impairment outcome compared to males. Interestingly, our data also suggest a better response to treatment in children with OPG diagnosed ≤ two years of age compared to older children. The findings in our study suggest sex as a potential prognostic factor for visual impairment.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Age
/ Child
/ Children
/ Complications and side effects
/ Female
/ Females
/ Glioma
/ Gliomas
/ Humans
/ Male
/ Males
/ Medicine
/ Neurofibromatosis 1 - pathology
/ Optic Nerve Glioma - pathology
/ Patients
/ Sex
/ Tumors
