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CD23 pin



Methodology: IHC

Clinical Significance:
CD23 is a cell surface-associated protein expressed on a subset of activated B cells, and on a large subset of follicular dendritic cells (FDCs). CD23 tends to be strongly coexpressed with CD5 on the neoplastic B cells of chronic lymphocytic leukemia/small lymphocytic lymphoma. Subcellular Localization: Membranous


Disease State: Chronic Lymphocytic Leukemia / Small Lymphocytic Lymphoma (CLL/SLL)

CPT Code(s): 88342 or 88341 (reference only; CPTs may vary)

Turnaround Time: Within 1-2 business days of receipt

Schedule: Monday - Friday

Specimen Requirements:
• Formalin-fixed, paraffin-embedded (FFPE) tissue block or cell block - OR - • 1 unstained slide for each test requested plus 3-4 additional unstained slides cut at 4µm