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Updated: Jun 17, 2026

Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
[Clinical and pathological topics of multiple sclerosis]
1Center for Brain Research, Medical University of Vienna, Spitalgasse 4, A-1090 Wien, Austria.
Abstract:
Therapeutic options for patients with progressive multiple sclerosis are currently limited. This is in part due to lack of knowledge regarding the pathophysiology of the disease in this stage. This review summarizes recent findings, showing profound differences in the pathology between relapsing and progressive MS. Pathological hallmarks in progressive MS are slow expansion of pre-existing white matter lesions, massive cortical demyelination and extensive diffuse injury of the normal appearing white matter. As in relapsing MS also in progressive MS active tissue injury is invariably associated with inflammation, but inflammation seems to be trapped behind a closed blood brain barrier. Different immunological mechanisms are involved in tissue destruction in progressive MS, but inflammation induced mitochondrial injury appears to be a dominant pathway. Future therapeutic interventions will have to target inflammation, which is compartmentalized in the central nervous system. In addition, however, neuroprotective therapies may be necessary.
Insights
Therapeutic options for progressive multiple sclerosis (MS) are limited due to poor understanding of its pathophysiology. This review highlights distinct progressive MS pathology, emphasizing inflammation-induced mitochondrial injury as a key target for future treatments.
Area of Science:
- Neuroimmunology
- Neuropathology
Context:
- Limited therapeutic options for progressive multiple sclerosis (MS).
- Incomplete understanding of progressive MS pathophysiology.
- Need for targeted treatments addressing distinct pathological features.
Purpose:
- To review recent findings on the pathophysiology of progressive MS.
- To identify key differences between relapsing and progressive MS pathology.
- To inform future therapeutic strategies for progressive MS.
Summary:
- Progressive MS exhibits unique pathology, including white matter lesion expansion, cortical demyelination, and diffuse normal-appearing white matter injury.
- Active tissue injury in progressive MS is linked to inflammation, often compartmentalized behind the blood-brain barrier.
- Inflammation-induced mitochondrial injury is a dominant pathway in progressive MS pathogenesis.
Impact:
- Identifies critical pathological differences between relapsing and progressive MS.
- Highlights inflammation-induced mitochondrial injury as a key therapeutic target.
- Suggests a dual approach of targeting CNS-compartmentalized inflammation and neuroprotection for progressive MS treatment.
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