Figure 1: Imaging of the anal sphincters with 3D transperineal
ultrasound. The white stars indicates a discontinuity in the internal
anal sphincter in 3 slices that corresponds to a complete IAS defect.Figure 2: Imaging of the anal sphincters with 3D transperineal
ultrasound. The black arrows indicates a discontinuity in the internal
anal sphincter in 2 slices that corresponds to a incomplete IAS defect.Figure 3: Thinning of internal anal sphincter indicated with
white arrows.