In adults with primary hypertension, greater CMB burden was independently associated with MCI and selected cognitive domains, while sNFL had a numerically higher AUC than CMB count for identifying MCI and adding CMB count did not improve discrimination beyond sNFL alone.
CMBs were detected in nearly half of hospitalized hypertensive adults, and MCI was similarly prevalent in this population.
Greater CMB burden was independently associated with significantly higher odds of MCI after multivariable adjustment.
Greater CMB burden was associated with lower scores in executive function, orientation, attention, and visuospatial function, but not with memory or language.
Cognitive domain scores did not differ according to CMB location.
Both CMB count and serum neurofilament light chain (sNFL) were inversely correlated with cognitive performance.
sNFL alone discriminated MCI better than CMB count alone, and adding CMB count to sNFL did not improve discrimination.
The study design was cross-sectional and single-center, and the authors identified prospective validation as a prerequisite before clinical application.
This research suggests that in people with high blood pressure (hypertension), the presence of tiny brain bleeds called cerebral microbleeds (CMBs)—detected on a specialized type of MRI scan—is strongly linked to a higher risk of mild cognitive impairment (MCI). Nearly half of the 173 hospitalized hypertensive adults studied had CMBs, and nearly half had MCI. Patients with a higher number of CMBs were more than four times as likely to have MCI compared to those with none, even after accounting for age, education, blood pressure levels, diabetes, and prior stroke. Importantly, higher CMB burden was specifically associated with worse performance in thinking skills like executive function, orientation, attention, and visuospatial ability, but not with memory or language—suggesting that CMBs affect some cognitive abilities more than others in this population. The study also examined a blood protein called serum neurofilament light chain (sNFL), which is released when brain nerve fibers are damaged. Both higher CMB counts and higher sNFL levels were each linked to worse overall cognition. When the researchers tested how well each measure could identify who had MCI, sNFL performed better on its own (AUC 0.794) than CMB count alone (AUC 0.683), and combining the two did not meaningfully improve accuracy beyond sNFL by itself. This research suggests that measuring sNFL through a blood test may be a more practical and informative tool than counting CMBs on MRI for identifying cognitive impairment in hypertensive patients, though the two measures capture related aspects of brain injury. Because this was a single-center study examining patients at one point in time, the authors caution that these findings need to be confirmed in larger, longer-term studies before they could be used to guide clinical decisions.
Li Z, Zhao X, Zhou D, Zhao C. (2026). Cerebral microbleeds on susceptibility-weighted imaging, cognitive domains, and serum neurofilament light chain in adults with hypertension.. Frontiers in neurology. https://doi.org/10.3389/fneur.2026.1909512