Comparison of MRI and endorectal ultrasonography in diagnosis of rectovaginal fistula
10.13929/j.issn.1003-3289.2020.05.018
- VernacularTitle: 对比MRI与直肠腔内超声诊断直肠阴道瘘
- Author:
Jing LIN
1
Author Information
1. Department of Ultrasound, the Sixth Affiliated Hospital, Sun Yat-Sen University
- Publication Type:Journal Article
- Keywords:
Diagnosis;
Endosonography;
Magnetic resonance imaging;
Rectovaginal fistula
- From:
Chinese Journal of Medical Imaging Technology
2020;36(5):716-719
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To compare the value of MRI and endorectal ultrasonography (ERUS) in diagnosis of rectovaginal fistula (RVF). Methods: Data of 51 patients with suspected RVF who underwent preoperative MRI and ERUS were retrospectively analyzed. Then all RVFs were classified according to the cause and complexity, respectively. Taken surgical operation outcomes as standards, the sensitivity, specificity and accuracy of MRI and ERUS in diagnosis of RVF were evaluated, and the detection rate of MRI and ERUS for various types of RVF were compared and analyzed. The consistency of MRI and ERUS diagnosis results with surgical results, also between MRI and ERUS diagnosis results were analyzed. Results: RVF were confirmed in 40 cases with surgical operation. No statistical difference of the sensitivity, specificity and accuracy of MRI (85.00%, 90.90%, 86.27%) nor ERUS (80.00%, 100%, 84.31%) with surgical operation was found (χ2=0.17, <0.01, <0.01, all P>0.05).Strong consistency of MRI and ERUS diagnostic results were found with surgical diagnosis (Kappa=0.65, 0.63, both P<0.05)and between ERUS and MRI (Kappa=0.70, P<0.05). The detection rate of MRI and ERUS for simple fistula were both 100%, while there was no significant difference in the detection rate of MRI and ERUS for complicated fistula (χ2=0.17, P=0.69). The detection rate for complex fistula increased to 88.57% (31/35) with the combination of MRI and ERUS. There was no statistically difference of the detection rate of MRI and ERUS among RVFs with different causes (all P>0.05). Conclusion: Both MRI and ERUS can be used to diagnose RVF. ERUS is recommended as the preferred examination for simple RVF, while the combination of MRI and ERUS can improve the detection rate of complex RVF.
