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
CPT Code(s): 88342 or 88341 (reference only; CPTs may vary)
Turnaround Time: Within 1-2 business days of receipt
Schedule: Monday - Friday
• 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