Availability of frequency-selective fat-saturation pulse (Fat-Sat) MRI in childhood optic neuritis.

A 2-year-old boy with acute optic neuritis, confirmed by gadolinium-DTPA enhancement of the optic nerve using frequency-selective fat-saturation pulse magnetic resonance imaging (Fat-Sat MRI), is reported. Because it is difficult in very young children to sufficiently evaluate visual acuity, visual field, and retroocular pain on eye movement, and visual evoked potential during wakefulness, Fat-Sat MRI will be useful for revealing optic nerve inflammation and for monitoring treatment.