Test Name: Congo Red
Methodology: Special Stains
Congo Red Stain Kit is used to identify amyloid in tissue sections on Artisan™ Link and Artisan™ Link Pro Staining Systems. Amyloid is an abnormal protein product that can be found in various pathologic conditions. This stain demonstrates amyloid in pink to dark pink with light (bright field) microscopy or the characteristic apple green bi-refringence with polarized light. Mayer’s Hematoxylin is used as a counterstain. This stain has been optimized with 8 µm thick tissue sections.
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*: 88313
*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.