PMC8416670_01
R imaging of case 1 (male, 56 yrs). T2w hyperintense lesions and swelling of the conus (A) and selective hyperintensity and swelling of the gray matter on axial imaging (B). On T1w, a diffuse contrast enhancement of the gray matter can be seen (C), as well as contrast enhancement of spinal roots in axial (D) and sagittal imaging (E).
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F1
A follow-up MRI 3 days later showed focal SC edema and persistence of subtle lesion contrast enhancement (Figures 1A-E).
PMC8416670_02
MR Imaging of case 2 (female, 63 yrs). T2w sagittal imaging shows swelling and hyperintense lesions of the conus (A) while axial T2w imaging shows a butterfly-shaped lesion involving only the gray matter [at T11-12, (B)]. T1w imaging showed discreet contrast enhancement of the anterior horns on axial imaging (C), and, on day 22 after onset, post-contrast T1w imaging also showed contrast of spinal cord roots (D).
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F2
Post-contrast T1-weighted MRI showed partial enhancement of the anterior parts of this lesion (Figures 2A-D). In addition, a follow-up SC MRI (22 days after the first MRI) showed new post-contrast enhancement of the cauda equina inT1-weighted MRI (Figure 2D).