Clinical Significance and Distribution of Cerebrospinal Fluid Type IV Oligoclonal Band Pattern in Neurological Disorders: A Retrospective Analysis

In 178 adult patients with a type IV oligoclonal band pattern at Geneva University Hospitals in 2023, 57.9% had non-inflammatory neurological diseases, making it the dominant association.

• Why it matters: Clinicians need guidance because type IV patterns are often interpreted as immune-related, yet their clinical meaning is nonspecific and may vary across neurological conditions.
• What they did: This retrospective observational chart review included all consecutive adults with type IV patterns detected during routine CSF analysis in 2023, summarizing demographics, diagnoses, and CSF laboratory findings.
• The result: Type IV patterns were found in 20.7% with other inflammatory neurological diseases, 4.5% with multiple sclerosis, and 11.2% with peripheral nervous system disorders, with temporal fluctuations in some patients without diagnosis changes.