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https://www.selleckchem.com/products/su6656.html Objective To explore the clinical and imaging characteristics of subacute combined degeneration of the spinal cord (SCD) related to recreational nitrous oxide (N2O) use. Methods Clinical and imaging data were retrospectively collected from patients with SCD related to recreational N2O use who were diagnosed and treated at Shengjing Hospital of China Medical University from January 2016 to June 2020. The clinical and imaging features of patients with recreational N2O-related SCD were compared with those of patients with N2O-unrelated SCD, who were diagnosed and treated during the same period of time. Results The study enrolled 50 patients (male/female 22/28, age 21.4 ± 4.7 years) with N2O-related SCD and 48 patients (male/female 27/21, age 62.0 ± 11.4 years) with SCD unrelated to N2O use. The most common signs/symptoms of the patients in both groups were limb numbness and weakness and unsteady gait, but the incidence of limb weakness, unsteady gait, disorders of urination and defecation, anorexia, reduced deep sensation in lower limbs, ataxia, and positive Babinski sign were lower in the N2O-related SCD group than those in the N2O-unrelated SCD group (P 0.05). Compared with the N2O-unrelated SCD patients, more patients with N2O-related SCD had abnormal spinal magnetic resonance imaging (MRI) scans (80.0 vs. 64.2%). The patients with N2O-related SCD also had wider spinal lesions on sagittal MRI (5.3 ± 0.8 mm vs. 4.2 ± 1.0 mm), fewer spinal segments with lesions (median 5, IQR 4-6 segments vs. median 6, IQR 5-7.5 segments), and a higher incidence of the inverted V sign on axial MRI (72.0 vs. 31.2%) (all P less then 0.05). Conclusion The recreational use of N2O has become an important cause of SCD in young patients. Compared with the N2O-unrelated SCD patients, the N2O-related SCD patients had less severe clinical presentations, less obvious decrease in serum VB12 levels, and more obvious MRI changes.Considering the wide
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