Spinal cord MS plaques are characteristically peripherally located, are less than two vertebral segments in length, and occupy less than half the cross-sectional area of the cord.

An initial MR imaging evaluation of the spinal cord after spinal cord injury provides supplemental prognostic information on the recovery of motor function in the upper and lower extremities.

FSE imaging, especially when performed with shorter echo spacing, increases the amount of T2-weighted information in the presence of metallic artifact because it decreases magnetic susceptibility effects.

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Upper thoracic vertebrae can be exposed without sternotomy or thoracotomy by a low left suprasternal approach. Midsagittal cervicothoracic MRI can identify the thoracic vertebrae above the sternum, thereby determining whether a low suprasternal approach is feasible. Otherwise, a lateral extracavitary or transpedicular approach can be used to avoid sternotomy or thoracotomy.

IATM may be caused by a small vessel vasculopathy. MR findings in IATM also occasionally are similar to those described in Guillain-Barré syndrome and suggest a possible relationship.

Primary tumors of the optic nerve are uncommon. The most common are optic nerve gliomas (ONGs), which account for 66% of all primary optic nerve tumors. Seventy-five percent of gliomas are diagnosed in the first decade of life, and 90% are diagnosed in the first two decades. This article discusses the anatomy and imaging of the optic pathway and the clinical manifestations of ONGs.