Role of MRI Fistulography with Gadopentate Enhancement in Assessment of Complex Anal Fistulas and Improving Surgical Outcomes
Journal of Surgery
Volume 5, Issue 2, April 2017, Pages: 22-27
Received: Mar. 11, 2017; Accepted: Mar. 20, 2017; Published: Apr. 10, 2017
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Authors
Mahmoud Abdelnaby, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
Sameh Hany Emile, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
Ahmad Sakr, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
Alaa Magdy, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
ElYamani Fouda, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
Ahmed Abdel Mawla, Colorectal Surgery Unit, General Surgery Department, Mansoura Faculty of Medicine, Mansoura University, Mansoura City, Egypt
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Abstract
Preoperative assessment of complex fistula-in-ano (FIA) is crucial for decision making. Magnetic resonance imaging (MRI) has been used for assessment of perianal sepsis with various protocols and methods. The aim of the present study was to assess the concordance between MRI fistulography with gadopentate enhancement and the intraoperative surgical findings, and to study the impact of preoperative assessment with MRI on surgical outcomes including fistula recurrence and fecal incontinence (FI). Patients with complex and high FIA who were investigated by MRI fistulography preoperatively were reviewed. The concordance between the findings of MRI and the intraoperative findings on examination under anesthesia (EUA) was made using Kappa coefficient test. The accuracy and sensitivity of MRI were calculated regrading detection of the internal opening, primary and secondary fistula tracts. 95 patients (82% males) were included in the study. MRI fistulography had an accuracy of 89.4%, 96.8%, 96.8%, 98%, and 98% in detection of the internal opening, number of tracts, position of primary tract, secondary extensions, and presence of abscess cavities, respectively. Overall, there was very good concordance between MRI and EUA regarding the examined parameters (k= 0.847, 0.937, 0.908, 0.953, 0.957), respectively. Fistula recurrence and minor FI were recorded in 4.2% and 14.7% of patients. MRI fistulography is an effective diagnostic modality for the preoperative assessment of FIA. MRI had excellent accuracy and sensitivity in detection of the internal opening, primary tract, and secondary extensions of anal fistula with very good concordance with the intraoperative findings.
Keywords
MRI, Fistulography, Anal Fistula, Complex, Assessment, Outcomes
To cite this article
Mahmoud Abdelnaby, Sameh Hany Emile, Ahmad Sakr, Alaa Magdy, ElYamani Fouda, Ahmed Abdel Mawla, Role of MRI Fistulography with Gadopentate Enhancement in Assessment of Complex Anal Fistulas and Improving Surgical Outcomes, Journal of Surgery. Vol. 5, No. 2, 2017, pp. 22-27. doi: 10.11648/j.js.20170502.13
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Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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