An anterior Chapman point on the proximal left iliotibial band corresponds to which colon region?

• A. Distal 3/5ths of the Transverse Colon
• B. Splenic Flexure and Descending Colon Middle Portion
• C. Sigmoid Area of the Colon
• D. Tonsils Between Rib 1 and 2 Adjacent to the Sternum

Answer: (C)

Chapman points are small surface landmarks that map to visceral regions, so anterior points reflect the corresponding organ in a defined surface area. For the colon, each segment has a distinct point. The sigmoid colon sits in the left lower quadrant and, in Chapman mapping, its anterior point lies along the proximal left iliotibial band. That makes a point there the best surface correlate for the sigmoid region, explaining why this location points to the sigmoid area of the colon. Other colon segments map to different locations higher in the left abdomen, and points like the tonsils are associated with a different body region altogether.