(A, B) Fluid-attenuated inversion recovery (FLAIR) image showing midbrain lesions with poorly defined margins located in the ventral part (symmetrical or bilateral).
(C, D) Sagittal image highlighting multiple brain stem lesions (midbrain, pons, medulla) with poorly defined margin
Brain stem lesions (arrows) on MRI of neuromyelitis optica (NMO)
(A) MRI showing medulla lesion located in the dorsal part with poorly defined shape.
(B) MRI showing linear medullo-spinal lesions.
(C) MRI showing distribution of NMO-characteristic brain lesions (dorsal brain stem) corresponding to sites of high NMO-IgG expression.
Brain stem lesions (arrows) on MRI of multiple sclerosis (MS)
(A, B) MRI showing solitary pons lesion with sharply defined borders. (C) MRI showing midbrain lesions.
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