Longitudinally extensive optic neuritis in pediatric patients.

Area of Science:

• Neurology
• Pediatric Neurology
• Neuroimmunology

Background:

• Optic nerve demyelination can indicate serious conditions like neuromyelitis optica in adults.
• Understanding lesion patterns in pediatric optic neuritis is crucial for diagnosis and prognosis.

Purpose of the Study:

• To determine the frequency of longitudinally extensive optic nerve lesions in children with their first episode of optic neuritis.
• To explore associations between lesion extent and diagnosis (multiple sclerosis vs. non-multiple sclerosis) or age in pediatric patients.

Main Methods:

• Retrospective analysis of brain or orbit MRI scans from children with new-onset optic neuritis.
• Lesion length was graded as absent, focal, or longitudinally extensive (≥2 contiguous optic nerve segments).
• Data collected from patients evaluated at the University of California, San Francisco, Pediatric Multiple Sclerosis Center.

Main Results:

• Nine out of 25 (36%) pediatric subjects presented with longitudinally extensive optic neuritis.
• No statistically significant association was found between extensive lesions and a multiple sclerosis diagnosis (P = 1.00).
• Lesion extent did not correlate with patient age (P = .26).

Conclusions:

• Longitudinally extensive optic neuritis is a relatively common finding in children experiencing their first optic neuritis episode.
• In this cohort, extensive lesions did not differentiate between multiple sclerosis and other diagnoses or predict outcomes based on age.
• Further prospective studies are warranted to investigate the prognostic value of longitudinally extensive optic neuritis for visual outcomes in children.