Color doppler ultrasonography per rectum after intrarectal pouting for diagnosis of rectal tumors / 肿瘤研究与临床

ABSTRACT

Objective To discuss the characteristics of ultrasonic images obtained by color Doppler per rectum after intrarectal pouring and the advantages of this method.Methods 40 cases who were diagnosed as rectal carcinoma prior to surgeries were investigated.The rectum was cleand and then was poured with normal saline before examination.Color Doppler ultrasonography per rectum was performed with intrarectal probe touching the inferior edge of the tumor.The 2-dimensional images and color Doppler images were then analyzed.Results The accurate typing of rectal tumors(detailedly,the ulcerative,intumescent,and confined types)can be obtained with this method.Within the 40 cases,24 were ulcerative,12 were intumescent and 4 were confined.Only one case with ulcerative tumor was misdiagnosed as intumescent.The total accuracy rate was 97.5%.As with rectal tumors less than 5cm,there was no significant difference between the measurement by ultrasonography and that by pathologic methods (P＞0.05).While for tumors larger than 5cm,the measurement by ultrasonography was significantly different from that by pathologic methods (P＜0.05).There was no significant correlation between the bloodstream signal of color Doppler and pathological grading(P＞0.05).The method can be applied for patients who have a narrow rectal duct or are suffering from agonies which prevent the passage of the colonoscope.For cases failing to detect the margin and surface of the tumor with routine method,or ultrasonic probe failing to pass the confined area leading to illegible 2-dimensional images,This method is competent as well.Conclusion Color Doppler ultrasonography per rectum after intrareetal pouring can be applied for the diagnosis of rectal tumors of all types.