Puzzled readers often ask why certain behaviors their elders exhibit seem to mirror classic Alzheimer’s disease, yet other behaviors don’t. Many are surprised when I suggest that the elder may have a “mixed diagnosis.” Just as someone can have cancer and diabetes at the same time, a person can have Alzheimer’s and Parkinson’s disease, or vascular dementia and Alzheimer’s disease, or any number of other pathologies which can cause dementia.
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