. "For example, the abdomen is usually divided into four areas: Right-upper quadrant Left-upper quadrant Right-lower quadrant Left-lower quadrant Other terms used to find the location of abdominal pain or masses include: Epigastric -- center of the abdomen just below the rib cage Periumbilical -- area around the bellybutton The location of the mass and its firmness, texture, and other qualities can p" . . .