An 80-Year-Old Woman Is Brought to the Office Due to Memory

An 80-year-old woman is brought to the office due to memory impairment. One month ago, the patient started having problems with her memory. She has been forgetting the place of her keys, has had difficulty remembering the time of her medications, and has neglected to feed her dog on multiple occasions. She has an interest in reading and playing with her grandchildren. She has decreased sleep time, diminished appetite, and low energy. The patient has hypertension and type 2 diabetes, for which she takes medications. The patient feels guilty and worthless. Temperature is 36.7 C (98.1 F) , blood pressure is 121/80 mm Hg, the pulse is 76/min, and respirations are 16/min. Neurological examination reveals no focal deficits. Montreal Cognitive Assessment score is 22 (normal: more than or equal to 26/30) . Which of the following is the most likely diagnosis?

A) Alzheimer's disease
B) Dementia with Lewy bodies
C) Depression-related cognitive impairment
D) Frontotemporal dementia
E) Normal aging
F) Vascular dementia