胰腺恶性肿瘤远较良性肿瘤常见，占消化道肿瘤的８％～１０％，在美国为第２位的胃肠道常见肿瘤〔１〕。国内本病的发病率近年来有升高趋势，据统计上海市市区居民１９７８～１９８２年胰腺癌标准化病死率为５．５／１０〔２〕。胰腺癌出现症状时常已是晚期，大部分患者在确诊 Pancreatic malignancies are more common than benign tumors and account for 8% to 10% of digestive tract tumors. They are the second most common gastrointestinal cancer in the United States [1]. The incidence of this disease in China has increased in recent years. According to statistics, the standardized mortality of pancreatic cancer in urban residents in Shanghai from 1978 to 1982 was 5.5/10 (2). The symptoms of pancreatic cancer are often late and most patients are diagnosed