This test detects amplification of the MDM2 gene for classification of certain adipocytic tumors. MDM2 amplifications are frequently detected in Well differentiated Liposarcoma, which includes Atypical Lipomatous Tumor (WDL/ALT) 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.