The symptom profiles of different neurodegenerative diseases often overlap, and diagnosing age-related cognitive symptoms is complex. A patient may have multiple overlapping disease processes in the brain at the same time, for example, Alzheimer’s disease and Lewy body disease, especially in the early stages of cognitive decline. Now, researchers at Lund University have developed an AI model showing that it is possible to detect several neurodegenerative diseases from a single blood sample. Their paper is published in the journal Nature Medicine.