COVID-19-Associated Myelitis Involving the Dorsal and Lateral White Matter Tracts: A Case Series and Review of the Literature

Axial T2 (A) and diffusion-weighted (B) images demonstrate T2 hyperintensity involving the posterior (gray arrow) and lateral columns (white arrows) with corresponding DWI hyperintensity and ADC hypointensity (C) confirming restriction (white arrows). Findings were less conspicuous on sagittal T2 (D) and postcontrast T1 (E) images, with only faint signal changes present (white arrows).

Axial T2 (A) and T1 postcontrast (B) images demonstrate T2 hyperintensity involving the posterior columns (gray arrow), with faint involvement of the lateral columns (white arrows, A). There was corresponding scattered patchy enhancement in these regions (gray arrow, B). T2 hyperintensity and expansion of the upper thoracic cord was well-demonstrated on sagittal views (white arrow, C). Brain MR imaging shows T2/FLAIR hyperintensity and corresponding enhancement surrounding the fourth ventricle (white arrows, D and E).

Axial T2 image through the thoracic cord demonstrates T2 hyperintensity involving the posterior columns (white arrow). Subtle hyperintensity could be seen in this region on sagittal T2 images (white arrow).