MICROSATELLITE INSTABILITY, TUMOR

Components
Pathology report must accompany specimen in order for testing to be performed.

Specimen Required
Send tumor tissue block. Approximately 0.6 x 0.6 cm area of tumor is required. Submit FFPE tissue
block with corresponding hematoxylin and reosin (H and E) slides (preferred) or 1 slide stained
with H and E and 5 unstained, nonbaked slides (5-micrometer thick sections) of the tumor tissue.

Alternate Specimen
Formalin-fixed, paraffin-embedded (FFPE) prepared cell block or unstained slides.

Rejection Criteria
Decalcified specimens, Low tumor percentage, insufficient amount of tumor nonformalin fixed,
fresh tissue Cytology smears

Methodology
Polymerase Chain Reaction (PCR)

Stability
Room temperature: preferred; Refrigerated: Unacceptable; Frozen: Unacceptable

Reference Range
See report

Performed
Sunday - Saturday

Turnaround Time3 - 4 days
Test CodeTMSI
CPT-4 Code (s)
81301, 88381
ZB1VG
LOINC Codes
Result Summary   50397-9  
Result   43368-0  
Interpretation   69047-9  
Specimen   31208-2  
Source   31208-2  
Tissue ID   80398-1  
Release By   18771-6  

Warde
Medical
Laboratory