Test Method

Molecular

CPT Codes

81301



Test Description

PCR and fragment analysis of paired normal and tumor tissue to determine microsatellite instability (MSI) at the standard five NCI-recommended loci.

Specimen Requirements

  • Bone marrow aspirate: 1-2 mL in EDTA tube (purple top) preferred; ACD (yellow top) acceptable
  • Peripheral blood: 5-10 mL in EDTA tube (purple top) preferred; ACD (yellow top) acceptable
  • Fresh Tissue: Minimum of 250 mg tissue in RPMI transport media
  • Formalin-Fixed Paraffin-Embedded Tissue: 1 H&E slide and 6-8 unstained slides, 5-7 microns of BM clot or tissue fixed with 10% NBF fixative. Please circle tumor for microdissection. alternatively, the FFPE clock of the BM clot can be sent for sectioning in our lab

Storage & Transport

Ship specimen the same day whenever possible, with refrigerated (not frozen) cold pack.

Label all tubes with at least two unique patient identifiers. Slides require one patient identifier. Identifiers include name, DOB, specimen ID# or medical record#.

Turnaround time

5 - 7 days

Level of Service

Global