The lower endoscopic app was generated by Dale Dangleben,MD for the Department of Surgery at the Lehigh Valley Health Network. The app was created with medical students and residents in mind. Several residents have contributed to the completion of this app. The app has three areas focused on education. The atlas gives an image and the diagnosis only. The quiz section has an image, a scenario followed by a multiple choice question. The Endoscopedia sectionhas the images, diagnosis , brief write up and references. Enjoy while you learn! DD Surgical: " Enhancing Surgical Education one app at a time"