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Test Code TCGRV T-Cell Receptor Gene Rearrangement, PCR, Varies

Reporting Name

T Cell Receptor Gene Rearrange, V

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Determining whether a T-cell population is polyclonal or monoclonal using body fluid or tissue specimens

Method Name

Polymerase Chain Reaction (PCR)


Shipping Instructions


Body fluid or spinal fluid specimens must arrive within 4 days of collection.



Specimen Required


Submit only 1 of the following specimens:

 

Specimen Type: Body fluid

Container/Tube: Sterile container

Specimen Volume: At least 5 mL

Collection Instructions:

1. If the volume is large, pellet cells prior to sending.

2. Send less volume at ambient temperature or as a frozen cell pellet.

Specimen Stability Information:

Body fluid: Ambient 4 days/Refrigerated/Frozen

Cell pellet: Frozen

 

Specimen Type: Paraffin-embedded bone marrow aspirate clot

Container/Tube: Paraffin block

Specimen Stability Information: Ambient

 

Specimen Type: Frozen tissue

Container/Tube: Plastic container

Specimen Volume: 100 mg

Collection Instructions: Freeze tissue within 1 hour of collection.

Specimen Stability Information: Frozen

 

Specimen Type: Paraffin-embedded tissue

Container/Tube: Paraffin block

Specimen Stability Information: Ambient

 

Specimen Type: Tissue slides

Container/Tube: Unstained tissue slides

Specimen Volume: 10 slides

Specimen Stability: Ambient

 

Specimen Type: Spinal fluid

Container/Tube: Sterile vial

Specimen Volume: 5 to 10 mL

Specimen Stability Information: Ambient 4 days/Refrigerated

 

Specimen Type: Extracted DNA

Container/Tube: 1.5- to 2-mL tube with indication of volume and concentration of DNA

Specimen Volume: Entire specimen

Collection Instructions:

1. Label specimen as extracted DNA and source of specimen

2. Indicate volume and concentration of DNA on label

Specimen Stability Information: Refrigerated/Ambient


Specimen Type

Varies

Specimen Minimum Volume

Body fluid or Spinal fluid: 1 mL
Tissue: 50 mg
Extracted DNA: 50 microliters at 20 ng/mcL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies

Reject Due To

Bone marrow core biopsies
Paraffin shavings		 Reject

Reference Values

An interpretive report will be provided.

Positive, negative, or indeterminate for a clonal T-cell population

Interpretation

An interpretive report will be provided.

 

Results will be characterized as positive, negative, or indeterminate for a clonal T-cell population.

 

In the appropriate clinicopathologic setting, a monoclonal result is associated with a neoplastic proliferation of T cells (see Cautions).

Day(s) Performed

Monday through Friday

Report Available

7 to 14 days

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 US Food and Drug Administration.

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
TCGRV T Cell Receptor Gene Rearrange, V In Process

 

Result ID Test Result Name Result LOINC Value
19936 Final Diagnosis: 22637-3
MP016 Specimen: 31208-2
608953 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.