Bergmann gliosis is hyperplasia of Bergmann glia due to Purkinje cell death, as may occur in a hypoxic-ischemic insult or peritumoral compression. In the case above, the cerebellum was compressed by a tumour (hemangioblastoma).
{{Information |Description={{en|1=High magnification micrograph of cerebellum with '''Bergmann gliosis'''. H&E stain. Bergmann gliosis is hyperplasia of [[w:Bergmann glia|Bergmann g