Markers related to neuroinflammation (YKL—40, IL—6): the level of YKL—40 in the CSF of AD patients is significantly higher than that in DLB patients and HC [53]; the level of IL—6 in the CSF of DLB patients is significantly lower than that in AD patients and non‐dementia controls [54]. This evidence concerns the gene CHI3L1 and Alzheimer disease.