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HelpTest Code LAB1234682 T-Cell Receptor Gene Rearrangement, PCR, Blood
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
T Cell Receptor Gene Rearrange, BSpecimen Type
Whole bloodShipping Instructions
Specimen must arrive within 7 days of collection.
Necessary Information
Include relevant clinical information and cytogenetic results, if available.
Specimen Required
Container/Tube:
Preferred: Lavender top (EDTA)
Acceptable: Yellow top (ACD)
Specimen Volume: 4 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send whole blood specimen in original tube. Do not aliquot.
Reject Due To
| Gross hemolysis | Reject |
| Moderately to severely clotted | Reject |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole blood | Ambient (preferred) | 7 days | |
| Refrigerated | 7 days |
Specimen Minimum Volume
1 mL
Special Instructions
Day(s) Performed
Monday through Friday
Specimen Retention Time
Whole blood: 2 weeks; Extracted DNA: 3 monthsReport Available
5 to 10 daysReference Values
An interpretive report will be provided.
Positive, negative, or indeterminate for a clonal T-cell population
Useful For
Determining whether a T-cell population is polyclonal or monoclonal using blood specimens
CPT Code Information
81340-TCB (T cell antigen receptor, beta) (eg, leukemia and lymphoma), gene rearrangement analysis to detect abnormal clonal population(s); using amplification methodology (eg, PCR)
81342-TCG (T cell receptor, gamma) (eg, leukemia and lymphoma), gene rearrangement analysis, evaluation to detect abnormal clonal population(s)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TCGR | T Cell Receptor Gene Rearrange, B | In Process |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 18210 | Final Diagnosis: | 22637-3 |
| 608951 | Signing Pathologist | 19139-5 |
Forms
1. Hematopathology Patient Information (T676)
2. If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.