Internal hemorrhoids. (Used, with permission, from John Cello, MD.) Source: Gastrointestinal Disorders, Current Medical Diagnosis & Treatment 2018 Citation: Papadakis MA, McPhee SJ, Rabow MW. Current Medical Diagnosis & Treatment 2018; 2017 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/2192/cmdt18_ch15_ef021-1.png&sec=168013804&BookID=2192&ChapterSecID=168013478&imagename= Accessed: October 26, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved