Application of interventional radiology in the diagnosis and treatment of retroperitoneal tumor        LI Qiang*, WANG Mao-qiang. *Department of Radiology, Chinese PLA 309 Hospital, Beijing100091, China
Corresponding author: WANG Mao-qiang, E-mail:wangmq@vip.sina.com
Abstract    Primary retroperitoneal tumor is a diverse group of benign and malignant tumors that arise within the retroperitoneum but outside the major organs. Because retroperitoneal tumors are often enormous and close to critical retroperitoneal structures and organs, the complete resection is difficult and the incidence of perioperative complications is high. The interventional radiologists have worked several aspects as follows: angiography is used to identify the vascellum around tumor; preoperative angioembolization of tumor can minimize intraoperative blood loss and selective arterial embolization is effective in preventing hemorrhagic complications of retroperitoneal benign tumors; vasotransplantation and reconstitution are often performed after the resection of retroperitoneal tumor, percutaneous balloon angioplasty is used to resolve the stenosis of major abdominal vascular graft; embolization and haemostasis in emergency should be performed when tumor break or bleed threating to life; imaging-guided percutaneous radiofrequency ablation has been used for treatment of unresectable retroperitoneal tumor to relieve the clinical symptoms.