Retrospective Cohort Study
Copyright ©The Author(s) 2017.
World J Gastroenterol. Aug 21, 2017; 23(31): 5732-5738
Published online Aug 21, 2017. doi: 10.3748/wjg.v23.i31.5732
Figure 1
Figure 1 All internal and external anal sphincter lengths found on endoanal ultrasound. A: Internal anal sphincter defect (arrowed) of the mid anal canal on endoanal ultrasound; B: External anal sphincter defect (arrowed) of the mid anal canal on endoanal ultrasound.