Figure 4b. (a) Photograph of a PEG button. The acorn-shaped portion of the button (*) is pulled up against the wall of the stomach to hold the button in place, while the cylindrical portion of the button (**) traverses the anterior abdominal wall. Its opening (O) is available for instilling feedings into the stomach or for removal of gastric contents, and it can be clamped shut with the attached plug (P). (b) Lateral view of the abdomen in a young child shows a PEG button (arrows).