Demyelinating Disorders and Imaging Techniques

Demyelinating disorders constitute a diverse group of diseases in which the protective myelin sheath surrounding central nervous system axons is damaged by immune-mediated or inflammatory processes. Clinical phenotypes range from classic multiple sclerosis and neuromyelitis optica spectrum disorder to acute disseminated encephalomyelitis and rarer entities such as Baló’s concentric sclerosis and tumefactive demyelinating lesions. Magnetic resonance imaging has revolutionised diagnosis, allowing visualization of lesion distribution, pattern of contrast enhancement and measures of brain atrophy. Advanced approaches—including diffusion-weighted imaging, proton spectroscopy, positron emission tomography with myelin-binding tracers and automated lesion quantification—are increasingly applied to refine differential diagnosis, monitor disease progression and assess therapeutic response. Recent advances in computational analysis and molecular imaging are driving a new era of precision diagnostics, with practical implications for early intervention, individualised therapy and prognosis.

Research from Nature Portfolio

A large retrospective analysis of tumefactive demyelinating lesions in a Southeast Asian cohort has detailed demographic patterns, lesion morphology and long-term outcomes. It highlighted that these large lesions often present with incomplete ring enhancement on contrast-weighted scans and may require tissue biopsy in nearly half of cases to exclude neoplasia. Most patients experienced a monophasic course with favourable functional recovery following high-dose corticosteroids and immunosuppressive therapy. In parallel, single-cell transcriptomic profiling of human tumefactive lesions versus glioma has delineated a unique microglial subset implicated in B-cell activation and mapped diverse T-cell states associated with demyelination and remyelination. This work underscores fundamental cellular differences between immune-driven lesions and tumours, paving the way for molecularly targeted diagnostic markers.

Research from all publishers

A comparative cohort study of atypical demyelination resembling acute disseminated encephalomyelitis or tumefactive presentations demonstrated substantial overlap with typical multiple sclerosis in terms of lesion volume, relapse rates and long-term disability. Despite more severe initial presentations, prognosis converged over several years, supporting early high-potency disease-modifying therapies in these cases. A novel radiomics-based machine-learning model has achieved diagnostic accuracy comparable to junior radiologists in distinguishing spinal cord tumours from tumefactive demyelinating lesions, using quantitative features extracted from standard T1- and T2-weighted imaging. Furthermore, population-based MRI surveys of multiple sclerosis in Thailand have confirmed distinctive lesion patterns—such as higher prevalence of periventricular and juxtacortical abnormalities—and underlined regional differences in spinal cord involvement. Together, these studies illustrate the global heterogeneity of demyelinating disorders and the growing role of computational imaging for precision diagnosis.

Demyelinating Disorders and Imaging Techniques publication trend

The graph below shows the total number of articles in demyelinating disorders and imaging techniques across all publications each year (not limited to Nature Index journals).

Technical terms

Demyelination: Loss or damage of the myelin sheath insulating nerve fibres, impairing electrical conduction in the central nervous system.

Tumefactive demyelinating lesion: A large demyelinating plaque (usually ≥2 cm) with mass effect and contrast enhancement that may mimic a brain tumour.

Radiomics: High-throughput extraction of quantitative features from medical images to characterise tissue heterogeneity and support diagnostic modelling.

Single-cell RNA sequencing: A technique that measures gene expression in individual cells, revealing cellular heterogeneity and functional states in tissues.

Magnetic resonance imaging (MRI): A non-invasive imaging modality that uses magnetic fields and radiofrequency pulses to visualise soft tissue structures and pathological lesions.

References

1. Long-term outcomes of ADEM-like and tumefactive presentations of CNS demyelination: a case-comparison analysis. Journal of Neurology (2024).
2. Brain and Spinal Cord MRI Findings in Thai Multiple Sclerosis Patients. Journal of Imaging (2023).
3. Tumefactive demyelinating lesions: a retrospective cohort study in Thailand. Scientific Reports (2024).
4. Establishment of an MRI-based radiomics model for distinguishing between intramedullary spinal cord tumor and tumefactive demyelinating lesion. BMC Medical Imaging (2024).
5. Integrative and comparative single-cell analysis reveals transcriptomic difference between human tumefactive demyelinating lesion and glioma. Communications Biology (2022).