Hippocampal sclerosis is a progressive degenerative disease which leads to loss of neurons in the brain's Hippocampal region. It was first described in the 1880s. Its diagnosis is often missed as the symptoms in the early stages (dementia etc) are very similar to.
It is estimated to affect around 10% of those over 85 years old.
Causes are unknown, although it's associated with aging, and appears to have links with vascular disorders and (low) socioeconomic status.
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