IntroductionMedical record, general examination, laboratory findings, neuropsychological interview and multidisciplinary consideration are essential to establish differencial diagnosis and correct approach in amnesic episodes.AimTo describe differences between organic and psychogenic anterograde amnesia.MethodsSingle case report and literature review.ResultsA 51-year-old man with only diagnosis of DM I, single, a good relationship with his family, without any personal or familiar psychiatric or neurological history, came to the hospital emergency department brought by his sisters referring disorientation, acute memory loss and mood changes, prevailing indifference to the situation for the last three days. After general exploration, including psychopatological examination and higher brain functions study, we arrived to the conclusion that the patient suffered from anterograde short-term severe amnesia as the only symptom, with evident conservation of autobiographic memory. The family referred as a possible stressor factor his mother's recent transfer to a different city, which had caused constant repeated questions about her location. Given the questionable presentation and trigger we shared the case with the neurologist, who ordered an array of tests to rule out any organic cause (LP, CT, MRI…), obtaining as a final result a diagnosis of limbic encephalitis, treated and effectively solved in two weeks with high-dose glucocorticoids.ConclusionCertain features of the symptoms exploration in amnesic episodes such as reiterative questioning about a specific topic, a non-modified autobiography or the absence of a clear traumatic precipitant factor, are essential for a correct approach and may lead the clinic to an organic evaluation.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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