Early-onset Alzheimer's is an uncommon form of dementia that strikes people younger than age 65. Glenn E. Smith, Ph.D., a neuropsychologist at Mayo Clinic, Rochester, Minn., answers questions about this condition.
How common is early-onset Alzheimer's?
Of all the people with Alzheimer's disease, only 5 to 10 percent develop symptoms before age 65. So if 4 million Americans have Alzheimer's, at least 200,000 people have the early-onset form of the disease. Early-onset Alzheimer's has been known to develop between ages 30 and 40, but that's very uncommon. It is more common to see someone in his or her 50s who has the disease.
What causes it?
It often runs in families. Many people with early-onset Alzheimer's have a parent or grandparent who also developed Alzheimer's at a younger age. A significant proportion of early-onset Alzheimer's is linked to three genes.
These three genes are different from the APOE gene — the gene that can increase your risk of Alzheimer's in general. But you can have the APOE gene and never develop Alzheimer's. Conversely, you can have Alzheimer's and not have the APOE gene. The genetic path of inheritance is much stronger in early-onset Alzheimer's. If you have one of those three genes, it would be very unusual for you not to develop Alzheimer's before age 65.
If early-onset Alzheimer's runs in my family, should I get tested for it?
That's a personal decision that only you can make. There are pros and cons to genetic testing. Anyone who's considering it should never proceed without genetic counseling — to examine these pros and cons beforehand.
Does early-onset Alzheimer's progress at a faster rate?
There's a perception that it does, but it's not backed up by hard data. It depends on what endpoint you're using in your measurement. If you use admission to a nursing home, that may occur earlier for the early-onset group — but only because their spouses have so many other things on their plates.
For example, people who have early-onset Alzheimer's often still have children at home. They or their spouses may have elderly parents that need care, too. That generation often is sandwiched between caring for their ailing parents and caring for their teenage children at the same time. Adding in a spouse with Alzheimer's can simply be too much to handle.
What types of problems occur more often in early-onset Alzheimer's?
Alzheimer's disease has a tremendous impact at any age. But we don't expect to see dementia at a young age, so problems emerging at work or home may be mistakenly ascribed to lack of motivation or diligence, or possible psychiatric problems. People with early-onset Alzheimer's may lose relationships or be fired instead of being identified as medically ill or disabled.
The loss of intimacy is something that comes up a lot with early-onset Alzheimer's. Many people who develop late-onset Alzheimer's have already been widowed. But couples in their 40s or 50s are often in the middle of their married lives. Spouses face the possibility of spending many years of their lives without an active partner. Losing the romantic component and changing to a caregiver status complicates the relationship.
Are there financial issues as well?
People with early-onset Alzheimer's often have to quit work, and this loss of income is a serious concern. Finances get even tighter if their spouses also quit their jobs to become full-time caregivers. Some medical benefits and many social-support programs won't provide assistance unless the person with Alzheimer's is over age 65. Younger people may need special waivers to get into such programs.
How important is it to obtain an accurate diagnosis?
Accurate diagnosis is critical so that you can explain your condition to your employer and perhaps arrange a lighter workload or more convenient schedule. For family reasons it is even more crucial. The diagnosis is fundamental in helping the family react with appropriate understanding and compassion. In addition, a complete evaluation will rule out reversible forms of dementia that might improve with treatment.
What advice do you have for those with early-onset Alzheimer's and their families?
The key treatments in Alzheimer's are education and support. This is especially true given the unique social challenges of early-onset Alzheimer's. Getting connected to services such as support groups can help you identify resources, gain a deeper understanding and learn ways to adapt to the situation.
By Mayo Clinic Staff
No comments:
Post a Comment