Test Name: CAM 5.2
Cytokeratins are polypeptide chains that form structural proteins within the epithelial cell cytoskeleton. Nineteen different molecular forms of cytokeratin have been identified in both normal and malignant epithelial cell lines.1 Because specific combinations of cytokeratin peptides are associated with different epithelial cells, these peptides are clinically important markers for classifying carcinomas (tumors of epithelial origin)2 and for distinguishing carcinomas from malignant tumors of nonepithelial origin such as lymphomas, melanomas, and sarcomas. The identification of cytokeratin has gained increasing importance in immunopathology. A scheme for the use of anti-cytokeratin in the classification of tumors is presented in the current Manual of Clinical Laboratory Immunology, Chapter 145.5.3
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.