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FIG 2. Images of a 41-year-old male patient who was suffering from spondylotic myelopathy with evolution of spastic tetraparesis over the course of 3 to 4 weeks.
A, Diffusion-weighted interleaved echo-planar image clearly shows a hyperintense lesion (straight arrow) surrounded by a hypointense, presumably edematous, area (curved arrows).
B, T2-weighted interleaved echo-planar image shows corresponding hyperintensity (straight arrow).
C, Reduced diffusion, confirmed by a region of interest–based analysis of apparent diffusion coefficient maps, is likely caused by vascular compromise with cell swelling (black arrow). Note that fiber structures of the pyramidal tract running in a cephalocaudal direction are clearly apparent in the pontine region and medulla oblongata (arrowheads) because of left-right diffusion gradient application. Cord hyperintensity from C1 to the proximity of the lesion in A is from white matter anisotropy, similar to that observed in volunteers.
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