Psychiatrymiddle twist
A 78-year-old woman is brought by her daughter because over eighteen months she has become slower at finding words and repeatedly mislays her keys. She still drives to the shops, takes her own tablets and does her own banking without error. She is alert and attends fully throughout the interview, denies low mood and sleeps well. Her gait is normal and she is continent. Formal testing shows delayed recall below the range expected for her age and schooling; thyroid function, vitamin B12 and electrolytes are normal, and computed tomography shows atrophy appropriate for age. Which one of the following best describes her current cognitive state?