Conversely, a meta-analysis reported that the levels of NfL in both blood and CSF were unable to differentiate between AD dementia and other conditions that are similar to it, such as vascular dementia, dementia with Lewy bodies, Parkinson's disease dementia, idiopathic normal pressure hydrocephalus, and posterior cortical atrophy [33]. The gene discussed is NEFL; the disease is posterior cortical atrophy.