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Effective Jan. 5, 2026: Temporary Age-Based Visitor Restrictions at UNC Health for all inpatient and waiting areas throughout its inpatient hospitals.

T-Cell Clonality

Tube Type = Yellow Top or Lavender Top

Tube Type

T-Cell Receptor Gene Rearrangement (TRG)

Test ID		LAB5679
EPIC Order		T-CELL CLONALITY
CPT Codes		81342, G0452
Laboratory		Molecular Genetics Laboratory
Tube Station		30
Specimen	Routine:	Performed on DNA extracted from blood and bone marrow. Blood (3mL) &/or bone marrow (1mL) must be collected in Yellow ACD-A tubes or Lavender EDTA tubes. Do not use heparin. Frozen tissue (3mm cubed) and paraffin embedded tissue are also acceptable. See Comments
Availability	Routine:	Weekly; no Weekends/Holidays
Turnaround Time		14 days
Reference Range		No T cell clone detected.
Comments		*Please call Lab (984-974-1825) with questions. Test is ordered by the Molecular Genetics Lab.* Additional Information: Laboratory Tests for B- and T-cell Clonality based on Immunoglobulin and T-Cell Receptor Gene Rearrangement Molecular Genetics Test Request form Directions for collecting and mailing specimens for Molecular Genetics Testing

Reviewed by J. Carr on November 20, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514