Cytokeratin 18 (CK 18), a 45kDa protein, belongs to the acidic type of cytokeratins, and is typically expressed in simple, nonstratified epithelia. However, CK 18 is also expressed in basal and superficial cells of transitional epithelium, as well as in the luminal/secretory cells of complex epithelia.
- A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type
- One (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4-5 microns) for each test/antibody ordered
- Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.
Use cold pack for transport. Make sure cold pack is not in direct contact with specimen.