Abstract
Magnetic resonance images obtained in two cases of spinal cord infarction are described: one with hemorrhagic thoracic cord infarct, the other with ischemic cervical cord infarct with sequential magnetic resonance imagings. An enlarged cord with strand-shape or longitudinal hypointensity on both T 1- and T 2-weighted images was noticed in the hemorrhagic infarct; hypointensity on the T 2-weighted image was thought to be due to hemosiderin, which shortens T 2 relaxation. In the ischemic infarct, a small, round area of hypointensity on T1-weighted images, and of hyperintensity on T2-weighted images, noted 9 hours postictus (“early infarct”) changed on the 22nd day to a cephalocaudal strandlike hypointensity on T1-weighted image, which was enhanced by Gd-DTPA. The hypointensity suggested “pencil-like softening” in “medium” age infarct. On postictal day 49, it showed an extensive homogeneous hypointensity involving several segments of the cord on Tl-weighted images and hyperintensity on T2-weighted images with negative Gd-DTPA enhancement suggesting “late transverse infarct”. We considered that these changes are of value in diagnosing spinal cord infarcts on magnetic resonance imagings.
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