Evaluación y diagnóstico del deterioro cognitivo leve

Mild cognitive impairment (MCI) is a sustained decrease of cognitive functions that is insufficiently severe to warrant a diagnosis of dementia. Currently, MCI is underdiagnosed. Since MCI often progresses to Alzheimer's disease, the challenge is to identify this process in the prodromal phase. New diagnostic criteria include the use of biomarkers. However, in daily practice, clinical history and the assessment of diverse areas, mainly neuropsychological, remain the most effective tools. The patient usually attends consultations with memory complaints, but is sometimes brought by relatives who observe substantial memory failures. The first step is to detect that there is cognitive impairment with screening tests such as the Mini Mental State Examination or the Seven Minute Test. To confirm suspicion, the evaluation is completed by assessing cognitive areas, especially memory, or by using specific batteries for cognitive deterioration and/or dementia. Complex functional tasks should be evaluated through scales of activities of daily living. Neurological and psychiatric symptoms should also be assessed. Additional studies (laboratory tests) are used to exclude reversible causes of cognitive impairment. Early diagnosis of MCI allows non-pharmacological therapies and, shortly, pharmacological treatments to be started as early as possible, thus slowing the development of cognitive deterioration.