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Immunofixation, Urine - 24 hour
Test Code39778
CPT Codes
86335<br>Limited Access Code
Preferred Specimen
25 mL of 24-hour urine collected in a leak-proof urine container - no preservative
Minimum Volume
15 mL
Other Acceptable Specimens
24-hour urine collected in a Urinalysis Transport tube (yellow-top, blue fill line) - no preservative
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Immunofixation
Setup Schedule
Set up: Mon-Sat; Report available: 1-3 days
Clinical Significance
Immunofixation is useful in evaluation of monoclonal free light chains and other monoclonal gammopathies seen in light disease, multiple myeloma, Waldenstrom's macroglobulinemia, amyloidosis, and other lymphoproliferative disorders. Increased polyclonal free light chains in urine may be seen in glomerular leak syndromes and in infection or inflammation.
