T-Cell Receptor γ-Chain Gene Rearrangements

CPT: 81342
Print Share

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. Five 10-micron sections of paraffin-embedded tissue. Small samples (eg, 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 frozen specimens for each test requested.

Storage Instructions

Maintain whole blood/bone marrow at room temperature. Maintain tissue in RPMI or ship frozen on dry ice.

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
480708 T-Cell Gene Rearrangement, PCR 480709 T-Cell PCR Interpretation 21753-9
480708 T-Cell Gene Rearrangement, PCR 480826 T Clonal Size N/A
480708 T-Cell Gene Rearrangement, PCR 481156 Block Number: N/A
480708 T-Cell Gene Rearrangement, PCR 489024 Director Review: 72486-4
480708 T-Cell Gene Rearrangement, PCR 480711 Methodology: 49549-9
480708 T-Cell Gene Rearrangement, PCR 480821 References: N/A

For Providers

Please login to order a test.


© 2018  Laboratory Corporation of America® Holdings and Lexi-Comp Inc. All Rights Reserved.

CPT Statement/Profile Statement

The LOINC® codes are copyright © 1994-2018, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf