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[Extrapontine osmotic myelinolysis]
Federico A Silva1, Christian F Rueda-Clausen, Fabián Ramírez
1Departamento de Ciencias Básicas, Universidad Industrial de Santander, Bucaramanga, Colombia. fsilva@fcv.org
Biomedica : Revista Del Instituto Nacional De Salud
|July 19, 2005
Summary
Extrapontine osmotic myelinolysis, a rare nervous system disorder, can cause severe neurological deficits. Rapid correction of hyponatremia in an alcoholic patient led to this condition, resulting in significant cognitive and motor impairments.
Area of Science:
- Neurology
- Internal Medicine
- Toxicology
Background:
- Extrapontine osmotic myelinolysis (EOM) is a rare neurological complication.
- Alcoholism is a significant risk factor for metabolic disturbances and neurological damage.
Observation:
- A 49-year-old male with alcoholism presented in cardiorespiratory arrest, exhibiting metabolic acidosis.
- Rapid correction of hyponatremia (from 142 to 174 mEq/l) within 48 hours.
- Clinical signs included cognitive impairment, dysarthria, bilateral amaurosis, hyporeflexia, and hemiparesis.
Findings:
- Brain CT revealed bilateral lenticular hypodensity and compromise of internal/external capsules, consistent with EOM.
- Neurological deficits persisted one month post-event, including cognitive impairment, optic atrophy, dysarthria, bradykinesia, and hemiparesis.
Implications:
- This case highlights the critical importance of slow and careful correction of electrolyte imbalances, particularly sodium levels, in at-risk patients.
- Prompt recognition and management of osmotic demyelination syndrome are crucial to mitigate long-term neurological sequelae.
- Understanding the link between alcoholism, metabolic derangements, and EOM is vital for clinical practice.