Serum Free Light Chains
Immunology
Sample and container requirements
Serum
Minimum volume required
4 ml Blood
Special requirements
None
Patient preparation
None
Sample viability
Stored at 4oC
Turnaround time
5 days
Reference range
Reference Ranges updated 10/10/2024 Age <70 yrs Serum free kappa light chain 6.3- 39.0 mg/L Serum free lambda light chain 5.9- 36.7 mg/L Free kappa: Free lambda ratio = 0.44 - 2.16 Age >=70 yrs Serum free kappa light chain 7.0- 55.8 mg/L Serum free lambda light chain 6.4- 48.0 mg/L Free kappa: Free lambda ratio = 0.46 - 2.59
Clinical guidance
Used in diagnosis and monitoring of Multiple Myeloma, and Monoclonal gammopathy of Undetermined significance
Notes
Images to go here
This information was last updated on 17 August 2026