Is moderate diffuse brain atrophy another name of alzheimer's? is it life threatening? will it worsen with time? how many stages ?

No, this is not: Loss of brain volume, shrinkage of the brain, or atrophy is not specific for alzheimers's , although always seen. Many demenita's and even parkinson's and alcohol use and even vitamin B12 deficiency can cause brain atrophy. The atrophy itself is not life threatening, although some would argue that the brain atrophy with "mad cow disease" type dementia's may have an association with mortality.

Terminology: Words can confuse: brain atrophy is shrinkage of brain, and many causes, including ms in younger, and alzheimer's in elderly. The cause of the atrophy could be benign or malignant. We all lose brain size with aging, but, if it is too rapid, it needs to be diagnosed, and treated. Dementia means loss of cognitive function, alzheimer's is but one cause.

No: Brain atrophy may occur with age and is not necessary causing alzheimer's disease. However, it may indicate increased risk for developing alzheimer's disease.

No but: If you have concerns please get a full evaluation from a geriatric psychiatrist or neurologist who specializes in cognitive disorders. You can get specific answers this way.

Can be part of aging: With aging all persons brains shrink some . It does not necessarily mean that one has dementia . However there are conditions associated with changes in the brain that require evaluation &treatment. If you have concerns or are experiencing symptoms please consider speaking with your doctor, consulting with a neurologist or even a geriatric psychiatrist . Good luck.