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  • Title: Nitrous oxide induced subacute combined degeneration of the spine cord: A case report.
    Author: Wang S, Li Z, Shi Y, Wang T, Jin W.
    Journal: Medicine (Baltimore); 2024 Feb 09; 103(6):e37032. PubMed ID: 38335379.
    Abstract:
    RATIONALE: In recent years, recreational use of inhaled nitrous oxide (N2O) is on the increase among young people, accompanied by a corresponding rise in reports about its toxicity. Subacute combined degeneration of the spine cord (SCD) is the typical clinical picture of the nervous system disorder caused by N2O intoxication, as a result of metabolic disturbance of vitamin B12. PATIENT CONCERNS, DIAGNOSES, INTERVENTIONS AND OUTCOMES: We report a 28-year-old female of SCD due to prolonged use of N2O, presented with paresthesia and unsteady in walking progressing within 1 month. Symptoms gradually improved with the treatment of intramuscular injections of hydroxocobalamin combined with N2O abstinence, and the patient recovered completely with normal neurological examination after 4 months of follow-up. LESSONS: Clinicians should be aware of the clinical features and pathogenesis of SCD caused by N2O intoxication in order to lead effective treatment as soon as possible. Recreational N2O use should always be considered as an etiology when dealing with patients presented with myelopathy and/or neuropathy suspected of vitamin B12 deficiency.
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