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Identifies many members of the cytokeratin group of cytoskeletal proteins. Very similar pattern of reactivity compared with the AE1/AE3 antibody cocktail. However, as a single monoclonal antibody, it has advantages over the AE1/AE3 antibody cocktail. It can thus be employed to identify carcinomas in the context of undifferentiated malignancies. Cytokeratin expression can identify carcinomas in the context of undifferentiated malignancies, although cytokeratins (generally at lower levels) can be expressed in a restricted subset of non-epithelial tumors (e.g., melanoma, smooth muscle tumors, etc.). Subcellular Localization: Cytoplasmic
Disease State: Small, Blue, Round Cell Tumors
CPT Code(s): 88342 or 88341. The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
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