Contrast- vs. non-contrast enhanced MR data sets for characterization of perianal fistulas

Abdominal Radiology
Kamonwon CattapanMukesh Harisinghani

Abstract

To evaluate the diagnostic efficacy between pre- and post-contrast MRI sequences in perianal fistulas using intra-operative findings as the gold standard. Retrospective analysis of 50 patients with a history of perianal fistula and MRI performed between January 2006 and January 2018 was performed. The inclusion criteria were patients who underwent MRI prior to surgery and had a detailed surgical report available. Pre- and post-contrast MR data sets were evaluated by two radiologists at two-week-intervals, assessed fistula type, internal/external opening, presence of abscess/secondary tracts, and confidence scores. The area under the curve (AUC) was used for comparison the diagnostic ability. The sensitivity and specificity were compared using the McNemar's test. The confidence scores in detecting perianal fistulas were significantly higher in the post-contrast MR data set (p < 0.003). The post-contrast MR data set had similar ability to classify perianal fistulas as combined T2-DWI and isolated T2 data sets in 49/50 cases. For internal/external opening, the post-contrast MR, combined T2-DWI, and isolated T2 data sets had 100% concordance with intra-operative reports. For perianal abscess, there was no significant difference in ...Continue Reading

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Citations

May 23, 2019·Journal of Magnetic Resonance Imaging : JMRI·David B ErlichmanVictoria Chernyak
Feb 7, 2020·Annals of Saudi Medicine·Khawaja Bilal WaheedZechriah Jebakumar Arulanatham

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