大肠肿瘤为消化道常见病。了解大肠肿瘤的性质和病变浸润的深度可为临床治疗提供准确的分期和有利于外科手术的选择。我院从１９９７年１０月到今年２月用超声内镜（ＥＵＳ）检查了１例大肠良恶性肿瘤，效果满意，报告如下。材料与方法１１例患者中，大肠息肉５例，其中直... Colorectal tumors are common diseases of the digestive tract. Understanding the nature of colorectal tumors and the depth of lesion infiltration can provide an accurate stage for clinical treatment and facilitate the choice of surgery. In our hospital from October 1997 to February this year, one case of benign and malignant colorectal cancer was examined by EUS. The results were satisfactory. The report is as follows. Materials and Methods In 11 patients, there were 5 cases of large intestine polyps, including straight ...