The immunopathology of multiple sclerosis: an overview

Area of Science:

• Neuroimmunology
• Neuropathology

Background:

• Multiple sclerosis (MS) is traditionally viewed as an inflammatory demyelinating disease affecting central nervous system white matter.
• Focal demyelinated plaques are the hallmark of this traditional understanding.

Purpose of the Study:

• To review emerging evidence expanding the understanding of MS pathology beyond focal white matter lesions.
• To explore the heterogeneity of pathological mechanisms and their clinical implications in MS.

Main Methods:

• Review of recent scientific literature and evidence.
• Analysis of pathological findings in multiple sclerosis.

Main Results:

• MS pathology encompasses demyelination in the cortex and deep gray matter nuclei.
• Diffuse injury in normal-appearing white matter is also a significant feature of MS.
• Pathological mechanisms are complex and heterogeneous, varying between patients and disease stages.

Conclusions:

• The spectrum of MS pathology is broader than previously recognized.
• Pathological heterogeneity contributes to diverse clinical presentations of MS, including relapsing and progressive forms.
• Understanding this heterogeneity is crucial for comprehending MS and related inflammatory demyelinating diseases.