Case Report
Copyright ©2014 Baishideng Publishing Group Co.
World J Gastroenterol. Jan 7, 2014; 20(1): 319-322
Published online Jan 7, 2014. doi: 10.3748/wjg.v20.i1.319
Figure 1
Figure 1 Endoanal ultrasound. Posterior hipoecoid nodule, well circumscribed, between internal and external anal sphincter, with posterior enhancement and central calcification. CAM: Middle anal canal; EAI: Internal anal sphincter; EAE: External anal sphincter; SE: Subepithelium.