Brain MRI of bilateral periventricular nodular heterotopias

Extensive bilateral periventricular nodular heterotopias (arrows) in a 21-year-old female with Lennox-Gastaut syndrome are visible on axial T1-weighted MPRAGE sequence (A), axial diffusion inversion recovery sequence (B), and axial T2 FLAIR sequence (C).

MRI: magnetic resonance imaging; MPRAGE: magnetization-prepared rapid acquisition gradient echo; FLAIR: fluid-attenuated inversion recovery.

Courtesy of Katie Bullinger, MD, PhD.