ObjectiveTo analyze the diagnostic value of endoscopic ultrasonography in patients with early colorectal cancer and the clinical therapeutic effect of endoscopic submucosal dissection(ESD).

MethodsThe clinical data of 120 patients with early-stage colorectal cancer admitted from October 2018 to December 2019 were retrospectively analyzed.All patients received endoscopic ultrasonography and ESD.Taking postoperative pathological results as the diagnostic gold standard, the diagnostic value of endoscopic ultrasonography in patients with early colorectal cancer was analyzed, and the ESD operation time, lesion, lesion diameter and complication follow-up were recorded.

ResultsThe pathological results showed that 53 cases were in Tm stage, 42 cases were in Tsm1 stage, and 25 cases were in Tsm2 stage.The diagnostic sensitivity of endoscopic ultrasonography for Tm stage was 90.57%, the specificity was 95.52%, and the diagnostic coincidence rate was 93.33%;the diagnostic sensitivity of Tsm1 stage was 78.57%, the specificity was 89.74%, and the diagnostic coincidence rate was 85.83%;the sensitivity of Tsm2 stage was 88.00%, the specificity was 93.68%, and the coincidence rate was 92.50%, the Kappa consistency test showed that the Kappa coefficient of endoscopic ultrasonography was 0.780.The patients were grouped according to the pathological stage, and the operation time was as follows: Tm stage < Tsm1 stage < Tsm2 stage(P < 0.01);there were statistically significant differences in the diameter of lesions between the groups in Tm, Tsm1, and Tsm2 stages(P < 0.01).There was no significant difference in the incidence and total incidence of various complications in patients of different stages(P>0.05).

ConclusionsEndoscopic ultrasonography has a high diagnostic value in the clinical stage of early colorectal cancer.Patients with early colon cancer treated with ESD have good postoperative recovery.However, the patients with a higher clinical stage have a longer operation time and a more extensive range of lesions.