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MRI scans subsequently revealed signs of gliosis, a side effect of neurological injury, which can lead to scarring in the brain.

Burda, J. E. & Sofroniew, M. V. Reactive gliosis and the multicellular response to CNS damage and disease.

In the cerebellar vermis there was marked granule cell atrophy and often widespread loss of Purkinje cells accompanied by severe Bergmann gliosis, while cerebellar hemispherical cortex showed only patchy loss of Purkinje cells and no significant granule cell loss.

The brain, normal macroscopically, proved microscopically to show, in all areas examined, superficial gliosis.

The brain was described grossly as normal: but microscopically there was marked superficial gliosis in all areas examined and considerable cell loss in suprastellate layers of precentral cortex.