Test Name: CD3
CD3 is a highly specific pan-T cell marker expressed on the membrane of all subsets of normal T cells and in early precursor T-cells (where it is predominantly cytoplasmic). It is most useful for the characterization of lymphoid neoplasms, where cytoplasmic or membrane expression defines T-cell lineage in T-lymphoblastic leukemia/lymphoma, peripheral T-cell lymphomas and mixed phenotype (T/myeloid) acute leukemias.
A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type or one (1) unbaked, unstained slide cut at 4-5 microns for H&E staining (required) and two to three (2-3) positively charged unstained slides cut at 3-4 microns for each test/antibody ordered.
Storage and Transport
Use cold pack during transport of paraffin blocks and unstained slides. Cold pack should not be placed in direct contact with the specimen during shipping
Specimen Rejection Criteria
Turn Around Time (TAT): 2-3 Days
CPT Codes*: 88341, 88342, 88360
*The CPT codes provided with our Test Descriptions are based on AMA guidelines and are for informational purposes only. Correct CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.