What does the medical abbreviation RUQ mean?

The medical abbreviation RUQ stands for "right upper quadrant". It refers to the upper right section of the abdomen, as divided into four quadrants by two imaginary lines intersecting at the navel. The RUQ is bounded by the ribs on the upper side, the midline of the body on the left, and a vertical line drawn through the right edge of the rectus abdominis muscle on the right. The RUQ contains several important organs, including the liver, gallbladder, pancreas, and part of the small intestine.