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Published on: November 9, 2018
[Non-paraneoplastic limbic encephalitis revealed by anterograde amnesia]
Pierre Olivier Lang1, François Sellal
1Service de médecine interne et réadaptation, Département de réhabilitation et gériatrie, Hôpitaux Universitaires de Genève, Hôpital des Trois-Chêne, 3 chemin du Pont-Bochet, CH-1226 Thônex-Genève, Suisse. Pierre.O.Lang@hcuge.ch
Limbic encephalitis, a paraneoplastic syndrome, can present with amnesia. This case highlights non-neoplastic causes and characteristic MRI findings of hippocampal lesions.
Area of Science:
- Neurology
- Radiology
- Oncology
Background:
- Limbic encephalitis is a neurological syndrome often linked to an undiagnosed cancer.
- It typically presents with progressive neurological symptoms over weeks.
Observation:
- A 56-year-old man experienced anterograde amnesia, indicative of limbic encephalitis.
- Magnetic resonance imaging revealed bilateral hippocampal lesions with specific signal characteristics.
Findings:
- The case suggests a non-neoplastic etiology for limbic encephalitis based on clinical, laboratory, and imaging data.
- Five-year follow-up confirmed the absence of malignancy.
Implications:
- This case underscores the importance of considering non-paraneoplastic causes of limbic encephalitis.
- It offers insights into comparing radiologic, imaging, and neurologic findings in bilateral hippocampal lesions.
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Amnesia
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
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