Methodology
Immunohistochemistry (IHC)
Test Description
The combination of CK5 + P63 + CK8/18 (Breast Triple Stain) can be useful in distinguishing ductal carcinoma in situ (DCIS) from microinvasive breast carcinoma. This multiplex can decipher between a radial scar and infiltrating carcinoma. P63 (nuclear brown) and CK5/6 (cytoplasmic brown) stain myoepithelial cells, whereas CK8/18 labels the cytoplasm (red) of all ductal or lobular epithelium.
Specimen Requirements
- A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type
or - 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.
Storage & Transportation
Use cold pack for transport. Make sure cold pack is not in direct contact with specimen.
CPT Code(s)*
88344 x 1
Turnaround Time
24 hours
Level of Service
Stain Only
New York Approved
Yes