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- Gustafsson, U M, et al.
(författare)
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Endoanal ultrasound or magnetic resonance imaging for preoperative assessment of anal fistula : a comparative study
- 2001
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Ingår i: Colorectal Disease. - : Wiley. - 1462-8910 .- 1463-1318. ; 3:3, s. 189-197
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To compare endoanal ultrasound (EUS) with a 10-MHz probe vs. bodycoil magnetic resonance imaging (MRI) in the preoperative evaluation of anal fistula. SUBJECTS AND METHODS: 23 patients with fistula in the anal region underwent preoperative 0.5 T bodycoil MRI and 10 MHz EUS which included probing in 6 patients. The results of the EUS and MRI were compared against the surgical findings as a reference method. RESULTS: In classification of the primary tract there was agreement between EUS and surgical findings in 14 (61%) and between MRI and surgery in 11 (48%). Concerning the presence of an internal opening the corresponding figures were 17 (74%) and 10 (43%) and in judging the presence of an extension or an abscess 15 (65%) vs. 11 (48%), respectively. In three out of eight patients with nonhealing or recurrence after surgery preoperative imaging had shown an extension and/or an abscess that was not identified by the surgeon. CONCLUSION: EUS, sometimes complemented with probing, is well comparable to bodycoil MRI in classifying and describing the topography of an anal fistula.
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