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Test Code TLCU Immunoglobulin Total Light Chains, Urine

Additional Codes

Allen MisLab
Epic ID LAB2570

 

Specimen Type

Urine


Ordering Guidance


If serum is being submitted on the same patient for FLCS / Immunoglobulin Free Light Chains, Serum; that test should be ordered under a different order number.



Specimen Required


Submit only 1 of the following specimens:

 

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

 

Specimen Type: Random urine

Collection Container/Tube: Clean, plastic urine collection container

Submission Container/Tube: Plastic, 5-mL tube

Specimen Volume: 1 mL

Collection Instructions:

1. Collect a random urine specimen.

2. Refrigerate after collection and send refrigerate.

 

Specimen Type: 24-Hour urine

Container/Tube: Plastic, 5-mL tube

Specimen Volume: 1 mL

Collection Instructions:

1. Collect urine for 24 hours.

2. No additive needed for preservation.

3. Urine may be kept ambient during the collection period but should be refrigerated within 4 hours of collection completion.

Additional Information: See Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens for multiple collections.


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 7 days
  Frozen  20 days
  Ambient  72 hours
UPH Waterloo Region Lab Test Catalog Note:

Transport refrigerated.

Reject Due To

  All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Method Name

Nephelometry

Profile Information

Test ID Reporting Name Available Separately Always Performed
KTLCU Kappa Total Light Chain, U No Yes
LTLCU Lambda Total Light Chain, U No Yes
KLTRU Kappa/Lambda TLC Ratio, U No Yes

Useful For

Monitoring patients whose urine demonstrates large M-spikes

 

Confirming the quantitation of specimens that show M-spikes by electrophoresis

 

Detecting urine monoclonal proteins and identification of specimens that need urine protein electrophoresis

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 3 days

Reference Values

KAPPA TOTAL LIGHT CHAIN

<0.9 mg/dL

 

LAMBDA TOTAL LIGHT CHAIN

<0.7 mg/dL

 

KAPPA/LAMBDA RATIO

0.7-6.2

CPT Code Information

83883 x 2