Abnormal Serum Light Chain Ratio May 2026

An indicates that the balance between two types of proteins— kappa and lambda free light chains—is outside the standard range of roughly 0.26 to 1.65 . These proteins are produced by plasma cells to help your immune system fight infections.

Your doctor will likely look at your results alongside other health markers to determine if follow-up is needed: Free Light Chains: MedlinePlus Medical Test Abnormal Serum Light Chain Ratio

Conditions like multiple myeloma or MGUS (Monoclonal Gammopathy of Undetermined Significance) can cause one type of light chain to be overproduced, skewing the ratio. An indicates that the balance between two types

Conditions like rheumatoid arthritis or recent viral infections can temporarily increase light chain production. skewing the ratio.

A rare condition where misfolded light chains build up in organs like the heart or kidneys. Typical Next Steps

Because the kidneys filter these proteins out of your blood, chronic kidney disease can lead to higher levels and slightly altered ratios.