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The median life expectancy is around 9 years, and the average life expectancy is 16.3 years. [ 1 ] The causes of death are attributed to respiratory complications in the late stage of the disease (e.g. pneumonia ), neurological complications (e.g. drug resistant epilepsy ), and cardiac events.
A person with inherited prion disease has cerebellar atrophy. This is quite typical of GSS. Specialty: Neurology Symptoms: difficulty speaking, developing dementia, memory loss, vision loss. Causes: Prions: Prognosis: Universally fatal, life expectancy is typically 5-6 years from diagnosis
The remaining variation is due to environmental factors and other genes that influence the mechanism of the disease. [26] Life expectancy in HD is generally around 10 to 30 years following the onset of visible symptoms. [26] Juvenile Huntington's disease has a life expectancy rate of 10 years after onset of visible symptoms.
Frontotemporal dementia (FTD) is an early onset disorder that mostly occurs between the ages of 45 and 65, [13] but can begin earlier, and in 20–25% of cases onset is later. [ 11 ] [ 14 ] Men and women appear to be equally affected. [ 15 ]
Alzheimer's disease (AD) is a neurodegenerative disease that usually starts slowly and progressively worsens. [2] It is the cause of 60–70% of cases of dementia. [2] [15] The most common early symptom is difficulty in remembering recent events. [1]
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