Long before the first symptoms of Alzheimer's appear, harmful proteins begin to accumulate in the brain. This process, which can extend over decades, is now increasingly detectable better and earlier thanks to modern scientific advances.
Traditionally, amyloid clumps and tau clumps were only detected after death through brain testing. Today, we can identify these biomarkers as early as in life through PET scans, lumbar punctures, or blood tests. These tests allow us to determine early on whether a person is showing signs of Alzheimer's damage.
Besides the technical possibilities, these early tests also raise ethical issues. What do patients and their loved ones expect from these tests and how will they deal with the results? Research shows that there is a strong need for clarity on brain health, both to provide reassurance and to prepare for the future.
Test results can vary greatly in impact. A normal result often brings great relief, while an abnormal result can cause sadness and worry. Interestingly, despite the emotional charge of a negative result, no serious psychological consequences have been identified so far.
Many doctors see the benefits of early testing, especially for the timely initiation of treatments that can slow the progression of Alzheimer's disease. The importance of early diagnosis is widely recognised, underlining the need for proper training and guidelines for the use of these tests.