What lymphatic structure is located in the upper left quadrant of the abdomen?

• A. Spleen
• B. Liver
• C. Pancreas
• D. Stomach

Answer: (A)

The spleen is the lymphatic structure located in the upper left quadrant. It sits beneath the left rib cage, near the stomach and left kidney, and functions as a secondary lymphoid organ that helps filter blood and mount immune responses through its white pulp, while also storing blood cells in its red pulp. The liver, pancreas, and stomach are nearby digestive/metabolic organs, not lymphatic structures, so they don’t fulfill the role of a lymphatic organ in that region.