Test ID TCGR T-Cell Receptor Gene Rearrangement, PCR, Blood
Useful For
Determining whether a T-cell population is polyclonal or monoclonal
Special Instructions
Method Name
DNA Extracted for Analysis/Polymerase Chain Reaction (PCR)
Reporting Name
T Cell Receptor Gene Rearrange, BSpecimen Type
Whole bloodShipping Instructions
Specimen must arrive within 7 days (168 hours) of draw.
Necessary Information
Include relevant clinical information and cytogenetics results, if available.
Specimen Required
Container/Tube:
Preferred: EDTA (lavender top)
Acceptable: ACD (yellow top)
Specimen Volume: 4 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send specimen in original tube.
Specimen Minimum Volume
1 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Whole blood | Ambient (preferred) | 7 days | |
Refrigerated | 7 days |
Reference Values
An interpretive report will be provided.
Positive, negative, or indeterminate for a clonal T-cell population
Day(s) and Time(s) Performed
Monday through Friday
Performing Laboratory

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 |
Test Classification
This test was developed using an analyte specific reagent. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.NY State Approved
YesForms
1. Hematopathology Patient Information (T676) in Special Instructions
2. If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.