Test Method


CPT Codes


Test Description

Testing uses bi-directional sequencing of exons 12 and 18 of the PDGFRA (platelet-derived growth factor alpha) gene. Solid tumor enrichment is performed before extraction. Gastrointestinal stromal tumors (GISTs) and some other soft tissue tumors frequently exhibit these exon mutation hotspots, accounting for most PDGFRA mutation including the common TKI-resistance mutation D842V.

Specimen Requirements

  • 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, 8 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