You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is An 80-year-old person has started forgetting the names of familiar persons and places. There has been confabulation. He tends to forget whether he has had his meals. Clinical and neurological examination reveals no abnormality.CT scan of the brain showed symmetrical enlargement of lateral ventricles and wider sulci. The most likely diagnosis is- and explain in detail?
None