Test Name: CD5


Methodology: IHC


Test Description

CD5 is a pan-T-cell marker expressed on the membrane of all T-cell subsets (including early precursor T-cells), partially and weakly on subsets of normal B-lymphocytes, and on thymic epithelial cells. It is also expressed at variable levels by precursor and mature T-cell neoplasms, some B-cell lymphomas (including CLL/SLL, mantle cell lymphoma, CD5+ marginal zone lymphoma, CD5+ diffuse large B-cell lymphoma) and on thymic carcinomas.


Specimen Requirements

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

Click here to reference the 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.