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- January 15, 2026

New blood test shows extent of brain injury after stroke—and reveals treatment effects

Strokes are a medical emergency, yet imaging can capture only snapshots of how brain damage develops in the hours and days that follow. For many other organs, blood tests can indicate acute injury, but until now the brain has lacked a comparable marker. Researchers at LMU University Hospital and international partners report that a new blood biomarker, brain-derived tau (BD-tau), can track the extent of brain injury after ischemic stroke over time.

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