Test Name: CD43
CD43 is normal expressed on the membrane of normal T-lymphocytes, some activated B-lymphocytes, monocytes, granulocytes, plasma cells, platelets and B-lymphoid precursors (hematogones). Staining for CD43 is useful in characterizing abnormal B-immunophenotypes in B-cell lymphomas (e.g. marginal zone lymphoma, mantle cell lymphoma, CLL/SLL), and in marking poorly differentiated blastic infiltrates of myeloid or monocytic sarcoma, where CD43 is occasionally the only hematopoietic marker expressed by immunohistochemistry. CD43 is useful in supporting a hematopoietic origin for poorly differentiated neoplasms, as it is highly specific for hematopoietic lineage.
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.