The youngest confirmed case of Alzheimer's is a 19-year-old male from China, diagnosed in 2022, who experienced symptoms from age 17, making him the youngest patient with this diagnosis without a known genetic mutation, challenging previous understandings of early-onset Alzheimer's. This case is significant because most cases under 30 involve inherited gene mutations, but this patient had none, with brain scans and spinal fluid showing typical Alzheimer's biomarkers like hippocampal atrophy and tau protein buildup.
In a heartbreaking medical first, a 19-year-old has been diagnosed with Alzheimer's. This is the youngest person ever recorded with the condition. The young man was initially diagnosed by doctors in China in 2023.
Alzheimer's disease is the most common cause of dementia, accounting for 60-80% of dementia cases. Dementia is not a normal part of aging.
It may be possible to reduce your risk of Alzheimer's disease and other types of dementia by:
Life expectancy with Alzheimer's varies significantly, averaging 4 to 10 years after diagnosis, but can range from a few years to 20 years or more, heavily depending on age at diagnosis, overall health, and disease progression, with older diagnoses generally leading to shorter survival. For example, someone diagnosed in their 60s or 70s might live 7-10 years, while someone diagnosed in their 90s might only live about 3 years, with factors like high blood pressure impacting speed.
Life expectancy after a diagnosis of dementia decreases with increasing age. For example, an average person diagnosed with Alzheimer's disease between ages 70-79 can expect to survive seven more years, while a diagnosis after age 90 is associated with an expected survival of only 2.8 additional years.
The 7 stages of Alzheimer's, based on the Global Deterioration Scale (GDS), describe the progression from no decline (Stage 1) through mild (Stage 3), moderate (Stage 4), severe (Stage 6), to very severe (Stage 7) cognitive impairment, outlining increasing memory loss, functional difficulties (like managing finances, self-care), personality changes, and eventually loss of physical and communication abilities as the disease advances, with Stages 1-3 considered pre-dementia and Stages 4-7 as dementia stages.
The cause of roughly 70% of all dementia cases is Alzheimer's disease, a progressive brain disorder characterized by the buildup of amyloid plaques and tau tangles, leading to memory loss and impaired thinking that interferes with daily life, making it the most common form of dementia.
10 Warning Signs of Alzheimer's
Cognitive Health and Older Adults
The "2-finger test" for dementia involves an examiner showing a hand gesture (like interlocking index and middle fingers) and asking the patient to copy it, testing motor skills, visual memory, and coordination, as difficulties can signal early cognitive decline, but it's a screening tool, not a definitive diagnosis, prompting further medical evaluation. Other related tests include finger-tapping and finger-to-nose, looking for hesitation or misjudgment in movement.
Early symptoms of Alzheimer's disease include forgetting recent events or conversations. Over time, Alzheimer's disease leads to serious memory loss and affects a person's ability to do everyday tasks.
When someone gets the diagnosis of dementia, a cure is only very rarely possible (see p2 About Reversible Dementias). In the current issue of Neurology, Sacks and Shulman1 report one of these rare cases of a reversal of dementia involving a patient on steroid medication.
You Miss Out on Sleep
You do a few things you know you shouldn't -- we all do. But some of those bad habits can take a toll on your brain. For example, lack of sleep may be a cause of dementia, including Alzheimer's disease.
Experts are cautious but hopeful about developing treatments that can stop or delay the progression of Alzheimer's. Experts continue to better understand how the disease changes the brain. This has led to the research of potential Alzheimer's treatments that may affect the disease process.
However, people with Alzheimer's don't need a special class to be able to enjoy memories sparked by music. You could play some recorded music for them or even suggest that they sing along with you. You could also buy a simplified music player designed for people with dementia.
Reduce your risk of dementia
Are there any proven Alzheimer's prevention strategies? Not yet. But there's strong evidence that healthy lifestyle habits — such as diet, exercise and not smoking — may play a role in reducing your risk of Alzheimer's disease and other types of dementia.
Family history. The genes you inherit from your parents can contribute to your risk of developing Alzheimer's disease, although the actual increase in risk is small. But in a few families, Alzheimer's disease is caused by the inheritance of a single gene and the risks of the condition being passed on are much higher.
Physical exercise to help memory and thinking skills
The studies suggest exercise might be an effective way to reduce cognitive decline in later life. Several studies have also shown people who were physically active at age 70 experienced less brain shrinkage over three years than those who were not.
The number one cause of dementia is Alzheimer's disease, responsible for 60-80% of cases, characterized by brain plaques (beta-amyloid protein) and tangles (tau protein) that damage nerve cells, leading to progressive memory and cognitive decline, though vascular dementia from blood vessel damage is also a significant factor.
Aggression in the later stage of dementia is often a reaction to personal care. Someone may hit or push away those trying to help them or shout out to be left alone. The person with dementia may have felt scared, threatened or confused. Restlessness is also very common.
There is no known cure, but early diagnosis and treatment can lead to better quality of life. Stay healthy with a good diet and regular exercise. Stay away from alcohol and other substances that may affect memory, thinking, and behavior.
Rate of progression through Alzheimer's disease stages
The rate of progression for Alzheimer's disease varies widely. On average, people with Alzheimer's disease live between three and 11 years after diagnosis. But some live 20 years or more.