Lastly, of the 64 histological soft tissue sarcomas (many of which were retroperitoneal/intra-abdominal and hence for which DDL was in the differential diagnosis) (sites: 30 retroperitoneal, 16 intra-abdominal/mesenteric, 5 intrapelvic, 6 groin or spermatic cord, and 7 in abdominal wall, thorax/trunk, or leg), 14 (21.9%) (including 9/30 retroperitoneal tumors) showed MDM2 amplification, with 8 also having abnormal CEP12 signals. Here, MDM2 is linked to soft tissue sarcoma.