Grading cervical cord damage in neuromyelitis optica and MS by diffusion tensor MRI

Area of Science:

• Neuroimaging
• Neurology
• Radiology

Background:

• Neuromyelitis optica (NMO) and multiple sclerosis (MS) are debilitating inflammatory demyelinating diseases of the central nervous system.
• Cervical cord damage significantly impacts patient disability in these conditions.
• Accurate grading of spinal cord lesions is crucial for disease management and monitoring.

Purpose of the Study:

• To evaluate the efficacy of diffusion tensor magnetic resonance imaging (DT-MRI) in assessing cervical cord damage.
• To differentiate between patients with NMO, MS, and healthy controls using DT-MRI metrics.
• To explore the relationship between DT-MRI findings and clinical disability scores.

Main Methods:

• Diffusion tensor MRI scans were performed on 10 patients with NMO, 10 with MS, and 10 healthy controls.
• Quantitative analysis of mean diffusivity and fractional anisotropy in the cervical cord was conducted.
• Correlation analysis was performed between imaging metrics and the Expanded Disability Status Scale (EDSS) scores.

Main Results:

• Significant differences in average mean diffusivity (p = 0.008) and fractional anisotropy (p = 0.04) were observed between the three groups.
• A positive correlation was found between cervical cord average mean diffusivity and EDSS scores (r = 0.52, p = 0.02).

Conclusions:

• Diffusion tensor MRI is a valuable tool for grading cervical cord damage in NMO and MS.
• DT-MRI metrics reflect the extent of spinal cord pathology and correlate with clinical disability.
• These findings suggest DT-MRI's potential utility in monitoring disease progression and treatment response.