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Alternative Name
Platelet-derived growth factor beta
Test Description

Probe(s): PDGFB (22q13.1)
Disease(s): Dermatofibrosarcoma protuberans (DFSP)

Clinical Significance

Dermatofibrosarcoma protuberans (DFSP) commonly has the COL1A1-PDGFB fusion gene and other variants of PDGFB fusion that are related to DFSP pathogenesis and targeted therapies.

Specimen Requirements
  • Paraffin Block: Send paraffin block. Also send circled H&E slide for tech-only (required).
  • Cut Slides: H&E slide (required) plus 4 unstained slides cut at 4-5 microns. Circle H&E slide for tech-only.
  • Bone Marrow Aspirate: N/A
  • Peripheral Blood: N/A 
  • Fresh, Unfixed Tissue: N/A
  • Fluids: N/A
Storage and Transportation

Use cold pack for transport, making sure cold pack is not in direct contact with specimen.

CPT Code(s)*
88374x1 automated or 88377x1 manual.
New York Approved
Level of Service
Turnaround Time

3-5 Days

*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.