Test Details
Methodology
Polymerase chain reaction (PCR)
Result Turnaround Time
5 - 7 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Use
This assay can be used to detect clonal T-cell receptor γ-chain gene rearrangements in blood, bone marrow, and tissue specimens. The presence of a monoclonal gene rearrangement usually, but not always, reflects the presence of a T-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.
Specimen Requirements
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 to 2 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
Collection Instructions
Fresh tissue should be placed in RPMI medium or shipped frozen on dry ice. 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 specimens for each test requested.
Storage Instructions
Maintain whole blood/bone marrow or tissue in RPMI at 2°C to 8°C; FFPE specimens at room room temperature; frozen tissue at -80°C.
Causes for Rejection
Frozen whole blood/bone marrow; quantity not sufficient for analysis; tumor block containing no tumor tissue; broken or stained slides
References
LOINC® Map
| 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 | 481531 | References: | N/A | ||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 480709 | |||||
| Result Code Name | T-Cell PCR Interpretation | |||||
| UofM | ||||||
| Result LOINC | 21753-9 | |||||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 480826 | |||||
| Result Code Name | T Clonal Size | |||||
| UofM | ||||||
| Result LOINC | N/A | |||||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 481156 | |||||
| Result Code Name | Block Number: | |||||
| UofM | ||||||
| Result LOINC | N/A | |||||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 489024 | |||||
| Result Code Name | Director Review: | |||||
| UofM | ||||||
| Result LOINC | 72486-4 | |||||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 480711 | |||||
| Result Code Name | Methodology: | |||||
| UofM | ||||||
| Result LOINC | 49549-9 | |||||
| Order Code | 480708 | |||||
| Order Code Name | T-Cell Gene Rearrangement, PCR | |||||
| Order Loinc | ||||||
| Result Code | 481531 | |||||
| Result Code Name | References: | |||||
| UofM | ||||||
| Result LOINC | N/A |