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CK 8/18, technical only

Test ID: I CK8/18 TC CPT Code: 88342-TC
Expected Turnaround Time
2 days
Stated turn-around-times (TATs) are for clinical use only and subject to change based on biopharma protocol requirements. Final TATs will be specified in the biopharma study contract.
Clinical Information
Cytokeratins (CK) 8 and18 are major components of the intermediate filaments in thyroid, liver and most simple epithelia. CK8/18 can be used as a marker to aid in the identification of adenocarcinomas and squamous cell carcinomas, Paget cells, metastatic gastric and colorectal carcinomas. Technical component only. Pathologist read not included.
Requisition Forms
Immunohistochemistry Requisition

Specimen Requirements

Specimen Requirements
  • Fresh Tissues: Fixative should be at a 20:1 fixative to tissue ratio, 10% neutral buffered formalin (NBF) for 6-72 hours (48-72 hours PREFERRED)
  • Formalin-fixed Paraffin Embedded Tissue (FFPE blocks): FFPE Block, Formalin Fixed
  • Unstained slides: 2 slides (3-5 μM) per stain (min 1 slide per stain), Formalin Fixed
Specimen Stability
  • Fresh Tissue Tissues: ≤ 72 Hours
  • Formalin-fixed Paraffin Embedded Tissue (FFPE blocks): Indefinite
  • Unstained slides: Indefinite
  • Stained slides: Indefinite
Storage Requirements

15°C to 25°C

Shipping Conditions
Ambient
Shipping Recommendations
  • Fresh Tissues: AMBIENT
  • Formalin-fixed Paraffin Embedded Tissue (FFPE blocks) and unstained slides: AMBIENT, Use a refrigerated (NOT FROZEN) gel pack in the shipment to protect from extreme temperatures. Separate gel pack from specimen.
  • Specimens may be transferred to 70% alcohol for transportation purposes after fixation in 10% NBF or B plus.
Specimen Rejection Criteria

Specimens must be fixed in 10% NBF or B plus. All other fixatives will be rejected. 

Test Details

Synonyms

Keratin 8, KRT8, Cytokeratin-8, CK 8, CK-8, K8, K-8, K 8, Keratin Type II Cytoskeletal 8, Type-II keratin Kb8, K2C8, KO, Keratin 18, Cell Proliferation-Inducing Gene 46 Protein, Keratin Type I Cytoskeletal 18, KRT18, Cytokeratin-18, CK-18, CK 18, K18, CYK18, Keratin 18 Type I

Test Method
Immunohistochemistry
Methodology Category
IHC
Regulatory Status
IVD, CE-marked
Special Considerations
  • Fresh Tissues: Specimens may be fixed in formalin for 24-72 hours by collection sites, then transferred to 70% ethanol and stored at 2-8°C for longer term storage if needed. Samples must be tested 3 months after placing in ethanol.
  • Unstained slides: Positively charged glass slides required to prevent background staining and prevent tissue loss. Slides should be left unbaked.