Journal of Jilin University(Medicine Edition) ›› 2021, Vol. 47 ›› Issue (3): 753-760.doi: 10.13481/j.1671-587X.20210328

• Imageology • Previous Articles     Next Articles

Diagnostic values of three-dimensional transrectal ultrasound and MRI in diagnosis of T substages and circumferential resection margin of patients with middle and lower rectal cancer

Dong CHEN1,Zhiyao LI1,Haitao CHEN1,Zhirui CHUAN1,Yingxian ZHANG1,Xin JIN1,Shicong TANG2(),Xiaomao LUO1()   

  1. 1.Department of Ultrasound,Cancer Hospital,Yunnan Province,Third Affiliated Hospital,Kunming Medical University,Kunming 650118,China
    2.Department of Breast Surgery,Cancer Hospital,Yunan Province,Third Affiliated Hospital,Kunming Medical University,Kunming 650118,China
  • Received:2020-09-27 Online:2021-05-28 Published:2021-05-28
  • Contact: Shicong TANG,Xiaomao LUO E-mail:tang_shicong@126.com;blueskyluoxiaomao@163.com

Abstract: Objective

To compare the results of three-dimensional transrectal ultrasound (3D-ERUS) and magnetic resonance imaging (MRI) in the diagnosis of T substages and circumferential resection margin of the patients with middle and lower rectal cancer before operation,and to explore the diagnosis value of 3D-ERUS in the preoperative assessment of T substages and circumferential resection margin in the patients with middle and lower rectal cancer.

Methods

The data of 94 patients with rectal cancer confirmed by pathology were collected,and all the patients were examined by 3D-ERUS and MRI before operation. Kappa test was used to compare the consistency between the results of 3D-ERUS and MRI in the diagnosis of T substages and the pathological results.The specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV),precision,Recall and F1 were used to evaluate the results of 3D-ERUS and MRI in the diagnosis of T substages and circumferential resection margin in the patients with middle and lower rectal cancer. The differences between 3D-ERUS and MRI in the diagnosis of T substages and circumferential resection margin in the patients with middle and lower rectal cancer were compared.

Results

The accuracies of 3D-ERUS and MRI and the pathological results in the diagnosis of T substages in the patients with middle and lower rectal cancer were 81.91%(Kappa=0.736,P<0.01)and 74.47%(Kappa=0.624,P<0.01),respectively,and there was no statistical difference in the diagnostic accuracy of T substages in the patients with middle and lower rectal cancer between the two methods(χ2=1.12,P=0.289).The sensitivity, specificity, PPV, NPV, accuracy, recall and F1 diagnosed by 3D-ERUS in the rectal cancer patients at Tis, T1 and T2 stages were higher than those of MRI. The sensitivity, specificity, PPV, NPV, accuracies, recall and F1 diagnosed by MRI in the patients with rectal cancer at T4 stage were higher than those of 3D-ERUS. The accuracies of 3D-ERUS and MRI in the diagnosis of circumferential resection margin were 88.30% and 84.04%,and there was no statistical difference in the diagnostic accuracy of circumferential resection margin in the patients with middle and lower rectal cancer between two methods(χ2=0.402,P=0.526).

Conclusion

3D-ERUS and MRI have high accuracies in the evaluation of preoperative T substages and circumferential resection margin in the patients with middle and lower rectal cancer. 3D-ERUS has high clinical value in the evaluation of T substages of the patients with early rectal cancer.

Key words: rectal neoplasm, three-dimensional endorectal ultrasound, circumferential resection margin, magnetic resonance imaging

CLC Number: 

  • R735.37