Lateralized ante mortem and post mortem pathology in a case of Lewy body disease with corticobasal syndrome

Abstract Introduction Lewy body diseases are pathologically characterized by α‐synuclein pathology. Alzheimer's disease (AD) co‐pathology can influence phenotypes. In vivo AD biomarkers can suggest the presence of this co‐pathology in unusual cases, but pathological validation remains essential. Methods This patient originally presented with corticobasal syndrome and later developed visual hallucinations and parkinsonism consistent with a synucleinopathy. The patient underwent CSF sampling, 18F‐flortaucipir PET scanning, and brain donation with bilateral regions available for digital histological analysis. Results CSF Aβ42 and t‐tau were in the AD range. 18F‐flortaucipir scanning showed right‐lateralized retention in all lobes (t = 4.3‐10.0, P