The disease does not discriminate between races, but it appears to affect more women than men simply for the reason that they tend to live longer. Alzheimer's disease, sometimes known as Alzheimers, is the single most common form of dementia but a number of other cases are also known. Alzheimer's is a neurodegenerative disease. As the disease progresses the patient will advance from mild cognitive impairment, when the disease has not yet been diagnosed, to mild and advanced stages of dementia, finally reaching a severe stage of dementia. Alzheimers is the Death of the Mind Before the Death of the Body Examples are blood tests, which can identify other causes for dementia different than AD;[65] some of which may even be reversible;[75] or psychological tests for depression, as depression can both co-occur with AD or on the contrary be at the origin of the loved one's cognitive impairment.