REF MISC
Microsatellite Instability
Synonyms:
MSI
Performing Lab:
Referral Laboratory
Container Type:
FFPE tissue block or slides, lavender-top (EDTA) tube or green-top (sodium heparin) tube.
Specimen Type:
One paraffin-embedded tumor or slides, AND either whole blood or paraffin-embedded normal tissue or slides.
Preferred Volume:
8 unstained slides or a tissue block AND at least one matching normal slide (or tissue block) or 3 to 5 mL whole blood.
Store and Transport:
Room temperature (tissue block), and refrigerated (whole blood)
Unacceptable Condition:
Samples in which there is no evidence of tumor or normal tissue, hemolyzed blood samples, or samples in which there is insufficient quantity of specimen for analysis will be rejected.
CPT Codes:
81301
Method:
Multiplex Polymerase Chain Reaction (PCR); capillary electrophoresis