ArticleFrontiers in immunology2023
Establishing the best combination of the kappa free light chain index and oligoclonal bands for an accurate diagnosis of multiple sclerosis.
Article in Frontiers in immunology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- CSF κ-Free light chain index in suspected multiple sclerosis: diagnostic performance vs. Oligoclonal bands and alignment with 2017/2024 McDonald criteria.Acta neurologica Belgica · 2026Article
- Real-World Performance of CSF Kappa Free Light Chains in the 2024 McDonald Criteria.Annals of clinical and translational neurology · 2026Article
- The Kappa Free Light Chains Index in Multiple Sclerosis: From Emerging Evidence to Clinical Application.Journal of neurochemistry · 2026Article
- Kappa index: real-world study for assessing cut-off values that provide the best accuracy for multiple sclerosis diagnosis in patients with CIS.Frontiers in immunology · 2026Article
- Kappa free light chain index as a diagnostic and prognostic biomarker in multiple sclerosis.Journal of neurology · 2025Article
- Kappa Free Light Chain Index in the Real World-Do We Miss Clinically Relevant Information by Skipping Oligoclonal Banding?European journal of neurology · 2025Article
- Real-World Laboratory Analysis of Molecular Biomarkers in Multiple Sclerosis Centers in Central-Eastern European Countries Covering 107 Million Inhabitants.International journal of molecular sciences · 2025Article
- The Kappa Free Light Chains Index and Central Vein Sign: Two New Biomarkers for Multiple Sclerosis Diagnosis.Neurology and therapy · 2025Review
- Multiple sclerosis diagnosis and its differential diagnosis in patients presenting with type four 'mirror pattern' CSF oligoclonal bands.Journal of neurology · 2025Article
- Clinical and mechanistic effects of cladribine in relapsing multiple sclerosis: 2-year results from the MAGNIFY-MS Study.Therapeutic advances in neurological disorders · 2025Article
- Kappa Free Light Chains in Multiple Sclerosis as a Marker of Intrathecal Humoral Response: A Sex-Disaggregated Study.Diagnostics (Basel, Switzerland) · 2024Article
- Laboratory Diagnosis of Intrathecal Synthesis of Immunoglobulins: A Review about the Contribution of OCBs and K-index.International journal of molecular sciences · 2024Review
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12 authors.
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Abstract
Introduction: The immunoglobulin kappa free light chain (KFLC) index has been proposed as a potentially suitable alternative to oligoclonal IgG bands (OCGB) for diagnosing multiple sclerosis (MS), offering automation and reduced processing time. However, there is no consensus on the preferred approach or how to combine both techniques. Methods: This prospective cohort study aimed to determine the best utilization of OCGB and KFLC index in patients with a clinically isolated syndrome (CIS) followed for at least two years. OCGB and KFLC were assessed using isoelectric focusing and immunoblotting and turbidimetry, respectively. Sensitivity, specificity, and accuracy for diagnosing MS were calculated for each method. Results: The study included 371 patients, with 260 (70.1 %) being women, and a median age of 34.9 (27.8 - 43.9) years. Using a cut-off value of 6.1, the KFLC index demonstrated a sensitivity and specificity of 86.3% and 93.9%, respectively. The sensitivity of OCGB (95.3%) was higher (p < 0.001 vs. KFLC index) and the specificity (100%) was comparable to that of the KFLC index (p = 0.5). The concordance between the methods was not uniform across all patients, with 97.8% agreement in patients with KFLC index ≥ 6.1 and 56.0 % in patients with KFLC index < 6.1. In patients with a KFLC index < 6.1, OCGB still identified 75.0 % of MS patients due to its higher sensitivity. An algorithm using the KFLC index as a screening tool and OCGB as an alternative for patients with a negative KFLC index result achieved an accuracy of 96.3 %. Discussion: Combining the KFLC index and OCGB can provide an easily reproducible and accurate method for diagnosing MS, with OCGB primarily reserved for patients with a KFLC index < 6.1.
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