Brain scans of patient who died while on experimental Alzheimer's drug cause experts to question safety

brain scans of woman who died after taking experimental alzheimer's drug

An MRI scan of the patient's brain before receiving the drug shows (left) a few microhemorrhages (dark spots, examples marked by arrows). Scan after receiving the drug (right) shows dozens of microhemorrhages (marked by arrows).PROVIDED ANONYMOUSLY TO SCIENCE.

A neurologist who examined the patient's imaging explained that her brain swelling was so severe in some cases that the folds of the cerebral cortex appeared “merged and squashed.”