“…The presence of scar tissue within the IAS and EAS on anal endosonography has been associated impaired sphincter muscle function (low intra-anal pressures and squeeze pressures on ARM) (96) and with clinical symptoms of FI in children (97). The secondary aim of the rectal exam under anesthesia is to evaluate the anal canal with specific attention to the location of the anastomosis (ie, proximity to the dentate line, anoderm, skin) and the integrity of the dentate line (11,32,93,94,98). Damage to the dentate line may disrupt sensation and potentially increase risk of FI given the poor ability of the patient to discern between gas, liquid, or solid stool (93,94,98) (Fig.…”