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B-Cell Gene Rearrangements by PCR (IgH, IgK)

CPT 81261; 81264
Synonyms
  • IGH Clonality Assay
  • IGH Gene Rearrangement Assay
  • IGK Clonality Assay
  • IGK Gene Rearrangement Assay

Test Details

Cancer Type

Chronic lymphocytic leukemia (CLL), Hematologic malignancies, Leukemia, Lymphoma

Technology Used

Molecular

Turnaround Time

5 - 7 days

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Use

This profile can be used to detect clonal B-cell immunoglobulin heavy chain (IGH) and immunoglobulin k light chain (IGK) gene rearrangements in blood, bone marrow and tissue specimens with combined B-cell clonality detection rate of 99%. The presence of a monoclonal gene rearrangement usually, but not always, reflects the presence of a B-lymphocytic neoplasm, while polyclonal gene rearrangement patterns are found in benign reactive condition. Thus, the results of these studies can assist in the diagnosis of lymphoproliferative disorders.
 

Special Instructions

Please direct any questions regarding this test to customer service at 800-345-4363.

Limitations

This PCR assay is able to detect a clonal DNA population at the sensitivity of 5% in a background of polyclonal DNA.

This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.

Methodology

Polymerase chain reaction (PCR)

Specimen Requirements

Information on collection, storage, and volume

Specimen

Whole blood, bone marrow, formalin-fixed, paraffin-embedded (FFPE) tissue block or slides, fresh or frozen tissue

Volume

3 to 5 mL whole blood, 1 mL bone marrow, five unstained slides at 10 μM or formalin-fixed, paraffin-embedded tissue block, tissue in RPMI or frozen

Minimum Volume

0.5 mL whole blood, 0.5 mL bone marrow, two unstained slides at 10 μM

Container

Lavender-top (EDTA) tube, yellow-top (ACD) tube, green-top (heparin) tube, tan-top (K2-EDTA) tube and pink-top (K2-EDTA) tube, FFPE tissue block or slides, tissue in RPMI or frozen

Storage Instructions

Maintain blood, bone marrow or tissue in RPMI at 2°C to 8°C; FFPE specimens at room temperature; tissue at -80°C.

Causes for Rejection

Frozen whole blood/bone marrow; quantity not sufficient for analysis; tumor tissue; broken or stained slides

Collection

Fresh tissue should be placed in RPMI medium or shipped frozen on dry ice. Small samples (e.g., punch biopsies, fine-needle aspirates) will also be accepted. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate specimens for each test requested.

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