What does the medical abbreviation LUQ mean?

The medical abbreviation LUQ stands for "left upper quadrant". It is used to refer to the upper left portion of the abdomen, which is bordered by the ribs on the top, the midline of the body on the right, and the iliac crest (the top of the hip bone) on the bottom. The LUQ contains several important organs, including the stomach, spleen, pancreas, gallbladder, and kidneys.