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Imaging characteristic and role of MRI in diagnostic perianal fistula
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Abstract
SUMMARY
The aims of this study: To determine imaging chacteristic and the concordance in evaluation of perianal fistula between MRI image and operative result.
Materials and methods: Descriptive study was performed from January 2014 to September 2015 at Ha Noi Medical University Hospital. 95 patients with clinically suspected fistula-inano
underwent preoperative MRI and operated at HMU hospital. MRI scanning was performed on GE 1.5Tesla system with pelvis phased-array coil.
Results: There were 95 patients including 81 males and 14 female. Value of MRI sequences in detection of perianal fituas is high. The ability of T2W, STIR and T1W fat sat +Gado in
detection of fistulas are 94.7%, 95.7% and 98.9% respectively. In the classification of primary tracts, the concordance rate between
MRI image and operative result was 84.2%, most of which were transphinteric fistulas. The concordance rate in identification of the internal opening and the extensive lesions were 96.6% and 94% respectively.
Conlusions: MRI is a good imaging modality in preoperative evaluation of perianal fistulas with high accuracy (classification of primary tracts, detection of internal opening and assessment extensions).
Article Details
Keywords
Anal fistula, MRI, classification of fistulas
References
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