Researchers studied nearly 2 million older adults and found that cerebral amyloid angiopathy sharply increases the risk of developing dementia. This silent brain disease can increase the risk of dementia fourfold. Within five years, people with the condition were much more likely to be diagnosed with dementia than those without it. The increased risk persisted even in patients without a previous history of stroke. Experts emphasize the importance of early screening for memory and thinking changes in at-risk individuals. The study confirms the connection between this disease and a significant increase in dementia risk.