juli 2026 At the EAN 2026 Congress, Jesper Sømark, MD, Researcher and Consultant, Department of Neurology, Oslo University Hospital, Rikshospitalet, Norway, discusses the clinical potential of serum brain-derived tau in moyamoya angiopathy. He presents findings on its relationship with chronic cerebral hypoperfusion, cognitive function, and cerebrovascular reserve, and what these results may mean for the clinical evaluation of patients.