A molecular analysis was performed for all suspicions of sarcomas with specific genetic lesions [mutations of KIT/PDGFRA in gastrointestinal stromal tumors (GISTs), reciprocal translocation, or amplification of MDM2 in atypical lipomatous tumors, well-differentiated liposarcoma-dedifferentiated liposarcoma (ALT/WDLPS-DDLPS)]. 