ArticleFrontiers in neurology2021
Evaluation of Kappa Index as a Tool in the Diagnosis of Multiple Sclerosis: Implementation in Routine Screening Procedure.
Article in Frontiers in neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.
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Who cites it
22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 33 citations in OpenAlex.
- Cerebrospinal fluid kappa free light chains for the diagnosis of multiple sclerosis: A systematic review and meta-analysis.Multiple sclerosis (Houndmills, Basingstoke, England) · 2023Pooled it
- The Use of Kappa Free Light Chains to Diagnose Multiple Sclerosis.Medicina (Kaunas, Lithuania) · 2022Pooled it
- External validation of KFLC index threshold for multiple sclerosis diagnosis in a French cohort.Journal of neurology · 2026Article
- Diagnostic value of the kappa free light chain index in multiple sclerosis under the 2024 CSF positivity criterion: a multicentre study in oligoclonal band-negative patients.Frontiers in immunology · 2026Article
- Optimized Kappa-Index Test Protocol to Detect Intrathecal Immunoglobulin Synthesis in Multiple Sclerosis.European journal of neurology · 2025Article
- KFLC to Total CSF Protein Ratio Is an Alternative to KFLC Index to Diagnose Multiple Sclerosis: A Retrospective Study of 814 Cases.Neurology(R) neuroimmunology & neuroinflammation · 2025Article
- Relevance of Kappa and Lambda Free Light Chains in Autoimmune Astrocytopathy Associated With Anti-GFAP Antibodies.Annals of clinical and translational neurology · 2025Article
- The Kappa Free Light Chains Index and Central Vein Sign: Two New Biomarkers for Multiple Sclerosis Diagnosis.Neurology and therapy · 2025Review
- Predicting intrathecal immunoglobulin synthesis in the ICU: a comparative study of IgG-based indexes.Annals of intensive care · 2025Article
- Multiple Sclerosis: From the Application of Oligoclonal Bands to Novel Potential Biomarkers.International journal of molecular sciences · 2024Review
- Laboratory Diagnosis of Intrathecal Synthesis of Immunoglobulins: A Review about the Contribution of OCBs and K-index.International journal of molecular sciences · 2024Review
- Comparative assessment of two in-house-built isothermal assays for visual detection of African swine fever virus.Journal of biosciences · 2024Article
- Cerebrospinal fluid kappa free light chains for the diagnosis of multiple sclerosis: A consensus statement.Multiple sclerosis (Houndmills, Basingstoke, England) · 2023Article
- Establishing the best combination of the kappa free light chain index and oligoclonal bands for an accurate diagnosis of multiple sclerosis.Frontiers in immunology · 2023Article
- Kappa Free Light Chain Biomarkers Are Efficient for the Diagnosis of Multiple Sclerosis: A Large Multicenter Cohort Study.Neurology(R) neuroimmunology & neuroinflammation · 2023Article
- A New Laboratory Workflow Integrating the Free Light Chains Kappa Quotient into Routine CSF Analysis.Biomolecules · 2022Article
- Cerebrospinal fluid kappa free light chains as biomarker in multiple sclerosis-from diagnosis to prediction of disease activity.Wiener medizinische Wochenschrift (1946) · 2022Review
- An Update on Diagnostic Laboratory Biomarkers for Multiple Sclerosis.Current neurology and neuroscience reports · 2022Review
- [Usefulness of the kappa index in the diagnosis of multiple sclerosis and validation of reference values in the Community of Aragon].Revista de neurologia · 2022Observational
- Intrathecal B cell-related markers for an optimized biological investigation of multiple sclerosis patients.Scientific reports · 2022Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system. Previous studies have shown that cerebrospinal fluid (CSF) kappa free light chains (K-FLCs) may have a role in MS diagnosis. In this regard, the kappa index (K-Index) has demonstrated higher sensitivity, and slightly lower specificity than oligoclonal bands (OCBs), the gold standard for the detection of intrathecal immunoglobulin synthesis, a feature of MS. Here, we evaluated the performance of the K-Index (K-Index = CSF/serum K-FLC divided by CSF/serum albumin) for the differential diagnosis of MS in a cohort of patients with suspected MS. K-FLCs were quantitatively measured in parallel serum and CSF samples by turbidimetry (Freelite Mx reagent on an Optilite system, The Binding Site Group Ltd). From 160 (63.4%) of a total of 252 patients who had K-FLC in CSF <0.03 mg/dl, below the sensitivity limit of the technique, only one had a diagnosis of MS. However, the absence of OCB in this same patient suggested no synthesis of intrathecal immunoglobulin. Globally, MS patients presented significantly higher K-Index levels than patients without an MS diagnosis (66.96 vs. 0.025, respectively;
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