上腔静脉系薄壁低压血管,位于纵隔,易被纵隔病变如恶性肿瘤所压迫。Hunter(1757)首先提出上腔静脉综合征的定义,主要表现有颜面、颈部及上肢软组织肿胀,胸壁及颈静脉怒张,并常伴有进行性呼吸困难。其原因虽多,但以纵隔肿瘤压迫为主,目前治疗仍乏良策。作者1956年以来放射治 The superior vena cava is a thin-walled, low-pressure vessel located in the mediastinum and is easily compressed by mediastinal lesions such as malignant tumors. Hunter (1757) first proposed the definition of superior vena cava syndrome, the main manifestations of facial, neck and upper limb soft tissue swelling, chest wall and jugular vein engorgement, and often accompanied by progressive dyspnea. Although there are many reasons for this, the mediastinal tumor is the main force and there is still no good strategy for treatment. Radiation therapy since 1956