The left lower quadrant (abbreviated LLQ) of the human abdomen is the area left of the midline and below the umbilicus. The abdomen is divided into quadrants by doctors to localise pain and tenderness, scars, lumps and other items of interest. It includes the left iliac fossa and half of the left flank region.
The term is not used in comparative anatomy, since most other animals do not stand erect. The equivalent term for animals is left posterior quadrant.