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Updated: Sep 20, 2026

Isolating Central Nervous System Tissues and Associated Meninges for the Downstream Analysis of Immune cells
Published on: May 19, 2020
Idiopathic recurrent transverse myelitis
1Department of Neurology, University of Ulsan College of Medicine, Asan Medical Center, Songpa-gu, Seoul, South Korea. kkkim@amc.seoul.kr
Objective:
To determine whether idiopathic recurrent transverse myelitis (RTM) can be distinguished from multiple sclerosis-associated RTM (MSRTM) on the basis of clinical manifestations of myelopathy, or findings from magentic resonance imaging or cerebrospinal fluid examination.
Design:
A retrospective analysis of 37 cases was conducted. Patients were classified as having idiopathic RTM on the basis of recurrent myelitis confirmed by clinical manifestations of myelopathy and magnetic resonance imaging findings. On review patients with idiopathic RTM had normal cranial magnetic resonance imagings and did not demonstrate paraclinical evidence of spatial dissemination beyond the spinal cord of the disease process. Patients were classified as having MSRTM on the basis of criteria of Poser et al for clinically definite multiple sclerosis involving the central nervous system. Fifteen patients met study criteria for idiopathic RTM. Twenty-two patients had MSRTM.
Setting:
Asan Medical Center, Seoul, South Korea, from January 1, 1992, through December 31, 2001.
Main Outcome Measures:
Presenting symptoms and clinical manifestations, relapsing times, magnetic resonance imaging features (involved spinal cord segments in T2-weighted images and gadolinium 64-enhanced lesions on T1-weighted images), IgG index, and oligoclonal bands in cerebrospinal fluid were compared.
Result:
Idiopathic RTM occurred preponderantly in male patients and presented more often with acute transverse myelitis than did MSRTM. More than 2 relapses occurred in 6 cases (40%) of idiopathic RTM. The involved segments of spinal cord on T2-weighted images were not significantly different in idiopathic RTM and MSRTM, with enhancing lesions mostly in the posterior columns, and the spinothalamic and spinocerebellar tracts of white matter. Additionally, almost all patients with idiopathic RTM had normal cerebrospinal fluid indexes.
Conclusion:
Idiopathic RTM might be a disease entity distinct from MSRTM, differing in its male preponderance, absence of oligoclonal bands, frequent multiple relapses, and frequent presentation as acute transverse myelitis.
Insights
Idiopathic recurrent transverse myelitis (RTM) is distinct from multiple sclerosis-associated RTM (MSRTM). Key differences include male predominance, absence of oligoclonal bands, and presentation as acute transverse myelitis.
Area of Science:
- Neurology
- Neuroimmunology
- Clinical Medicine
Background:
- Recurrent transverse myelitis (RTM) presents diagnostic challenges, often overlapping with multiple sclerosis-associated RTM (MSRTM).
- Distinguishing between idiopathic RTM and MSRTM is crucial for accurate diagnosis and management.
Purpose of the Study:
- To differentiate idiopathic RTM from MSRTM using clinical, magnetic resonance imaging (MRI), and cerebrospinal fluid (CSF) findings.
- To establish criteria for identifying idiopathic RTM as a distinct clinical entity.
Main Methods:
- Retrospective analysis of 37 patients with RTM (15 idiopathic, 22 MSRTM) diagnosed between 1992-2001.
- Comparison of clinical presentations, relapse frequency, MRI findings (spinal cord lesions), and CSF analysis (IgG index, oligoclonal bands).
- Idiopathic RTM defined by recurrent myelitis without cranial MRI abnormalities or evidence of disease dissemination beyond the spinal cord.
Main Results:
- Idiopathic RTM showed a male preponderance and more frequent presentation as acute transverse myelitis compared to MSRTM.
- No significant differences in spinal cord lesion location were observed between the two groups.
- Patients with idiopathic RTM predominantly had normal CSF profiles, including normal IgG index and absence of oligoclonal bands.
Conclusions:
- Idiopathic RTM may represent a distinct disease entity separate from MSRTM.
- Clinical and paraclinical features such as male predominance, lack of CSF oligoclonal bands, and acute transverse myelitis presentation support idiopathic RTM as a unique diagnosis.
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