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©The Author(s) 2025.
World J Gastroenterol. Sep 7, 2025; 31(33): 109811
Published online Sep 7, 2025. doi: 10.3748/wjg.v31.i33.109811
Figure 5
Figure 5 Inter- and trans- sphincteric fistula. A: Transperineal ultrasound sagittal image showing intersphincteric fistula between internal anal sphncter and extenal anal sphicter (EAS); B: Transsphincteric fistula originating from anal canal and extending through EAS (12 o’clock); C: Axial view showing orientation of the long tract going anteriorly; D: Complex transsphincteric tract with anterior extension seen on transrectal ultrasound. F: Fistula; EAS: Extenal anal sphincter; IAS: Internal anal sphincter.


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