system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
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-
assistant
The correct answer is  None