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Fig. 12B —42-year-old woman with fecal incontinence after complicated vaginal delivery (long labor, assisted delivery, rupture). IS = lower part of internal anal sphincter, TPM = transverse perineal muscle, IAS = ischioanal space. Transverse endoanal T2-weighted fast spin-echo (2,500/70) MR image on same level as A shows scar tissue of external anal sphincter (ES) from 1- to 2-o'clock positions (black arrows).