Detection of optic nerve inflammation enables earlier multiple sclerosis diagnoses
Multiple sclerosis (MS) is the most common chronic autoimmune disease of the central nervous system. An early and accurate diagnosis is crucial for improving the effectiveness of treatment and reducing nerve damage. To standardize and speed up diagnosis, the so-called McDonald criteria were introduced in 2001 and have since been revised several times. They combine clinical findings—such as visual…
A new study published in eClinicalMedicine has shown that revised diagnostic criteria for multiple sclerosis (MS) in 2024 have significantly increased early detection rates. The research, conducted by a team from Hannover Medical School in Germany, found that incorporating the optic nerve as a diagnostic site led to a nearly 10 percentage point increase in early diagnoses.
Previously, the McDonald criteria focused on lesions in four areas, but adding the optic nerve was crucial because it is also affected by MS-related inflammation. This inclusion often revealed first signs of the disease, such as blurred vision and impaired color perception. The study found that the new criteria identified patients with radiologically isolated syndrome (RIS) before symptoms appeared, allowing for earlier diagnosis.
While new MRI markers were incorporated into the criteria, their use requires advanced imaging techniques and specialized expertise. However, the study emphasizes that conventional MRI, visual testing, and cerebrospinal fluid analysis—including the kappa index—remain effective and significant tools for early MS detection. The kappa index, which indicates inflammation in the central nervous system, is particularly valuable as it can be measured automatically and quickly in the lab.
The researchers conclude that the revised McDonald criteria, when implemented pragmatically, can lead to faster and more standardized diagnoses, particularly when cerebrospinal fluid diagnostics are included.
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