MDM2 FISH

Message

Probes: MDM2 (12q15) | Centromere 12. Disease(s): Liposarcoma

Test Code

LAB6132

Alias/See Also

E3 ubiquitin ligase

CPT Codes
88377x1 manual or 88374x1 automated

Preferred Specimen

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.

Instructions

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

Methodology
FISH

Report Available

3-5 days

Clinical Significance

This test detects amplifications of the MDM2 gene for classification of certain adipocytic tumors. MDM2 gene amplifications may appear microscopically as ring chromosomes, giant marker chromosomes, and double minutes. MDM2 amplifications are frequently detected in well-differentiated liposarcoma, which includes atypical lipomatous tumor (ALT/WDLS), and in dedifferentiated liposarcoma (DDLS). These tumors can be difficult to distinguish morphologically from other high-grade sarcomas and benign tumors. Amplifications are detected infrequently in other soft tissue sarcomas, and are not detected in benign lipomas. Drug targeting of MDM2 is an active area of clinical research.

Performing Laboratory
Neogenomics Laboratories

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.