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Fig. 10A —53-year-old woman after complicated vaginal delivery
(rupture). ES = external anal sphincter, IS = internal anal sphincter.
Transverse endoanal sonogram at midanal canal shows external (area of
amorphous texture; thin arrows) and internal (discontinuity of
sphincter ring; arrowheads) anal sphincter defects from 10- to
2-o'clock positions. Compare anterior part with
Figure 7. Top of figure is
anterior.