fig 1.

fig. 1. Continued.

G–I, Follow-up MR study 12 months later. Sagittal FSE T2-weighted (4700/112) images (G and H) show regression of the increased signal intensity within the entire cord. Sagittal contrast-enhanced SE T1-weighted (500/12) image (I) shows no evidence of contrast enhancement of the cervico-thoracic cord.

J and K, Microscopic sections show a small cortical vessel with its wall infiltrated by a proliferation of mononuclear cells in rarefied gliotic cerebral cortex (J) and fibrinoid necrosis with nuclear and cytoplasmic debris (arrows, K) and loss of normal structure of the white matter (K) (hematoxylin-eosin, original magnification ×275).