B-Cell, IgK Gene Rearrangements

CPT: 81264
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Test Details


This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA). The FDA has determined that such clearance or approval is not necessary.


Polymerase chain reaction (PCR)

Specimen Requirements


Whole blood, bone marrow, or tissue


7 mL whole blood or 3 mL bone marrow

Minimum Volume

3 mL whole blood or 1 mL bone marrow


Lavender-top (EDTA) tube, yellow-top (ACD) tube, green-top (heparin) tube, or tissue in RPMI or frozen


Fresh tissue should be placed in RPMI medium or shipped frozen on dry ice. Collect five 10-μM sections of paraffin-embedded tissue. Also acceptable are small samples (eg, punch biopsies, fine-needle aspirates). To avoid delays in turnaround time when requesting multiple test on frozen samples, please submit separate specimens for each test requested.

Storage Instructions

Maintain whole blood/bone marrow at room temperature.

Causes for Rejection

Frozen whole blood/bone marrow; quantity not sufficient for analysis


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
480812 IgK Gene Rearrangement, PCR 480813 IgK PCR Interpretation 21748-9
480812 IgK Gene Rearrangement, PCR 480828 K Clonal Size N/A
480812 IgK Gene Rearrangement, PCR 480777 Block Number: N/A
480812 IgK Gene Rearrangement, PCR 489028 Director Review 72486-4
480812 IgK Gene Rearrangement, PCR 480831 Methodology: 49549-9
480812 IgK Gene Rearrangement, PCR 480821 References: N/A

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