Which is NOT one of the four abdominal quadrants used in clinical assessment?

• A. Right upper quadrant
• B. Left upper quadrant
• C. Left lower quadrant
• D. Epigastric region

Answer: (D)

The key idea is understanding how the abdomen is divided for clinical assessment. There are four abdominal quadrants created by a vertical line down the midline and a horizontal line through the umbilicus. These quadrants are the right upper, left upper, right lower, and left lower. They help clinicians localize findings to specific organs: the liver and gallbladder in the upper right, the spleen in the upper left, and the intestines around the lower quadrants.

The epigastric region, however, belongs to the nine-region system of abdominal anatomy. It sits in the upper middle portion of the abdomen, above the stomach, and is not one of the four quadrants. So it’s not a quadrant; it’s a region used in a different way to describe location.