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Keratin 5 pin

IHC

Keratin 5

Methodology: IHC

Clinical Significance:
Identifies squamous and transitional cell epithelia, mesothelium, ductal epithelium and their corresponding carcinomas. In complex epithelia such as normal prostate glands, the basal cells in most cases express CK5. CK5 expression can also be seen in some nonsquamous carcinomas, e.g., pancreatic adenocarcinoma. Subcellular Localization: Cytoplasmic

Organ: Lung

Disease State: Carcinomas of Unknown Primary

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

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