University Archives

The duodenum, the initial segment of the small intestine, plays a critical role in digestion by receiving chyme from the stomach and mixing it with bile and pancreatic enzymes to allow for nutrient absorption. Structurally, it is the shortest and widest portion of the small intestine and contains two major landmarks known as the major and minor duodenal papillae. The major papilla, or papilla of Vater, acts as the terminal opening of the common bile and pancreatic ducts, while the minor papilla, if present, provides an additional drainage pathway from the accessory pancreatic duct. 

This study conducted a multi-year quantitative anatomical analysis of cadavers to determine the distances between the pyloric sphincter to the major papilla, and, when present, the minor papilla to the major papilla. The measurements were obtained from 108 cadavers using digital calipers for accuracy. The results showed that the mean distances from the pylorus to the major papilla was 7.81 cm, which was consistent with the established literature values (≈8.0 cm). However, the mean distances between the minor and major papillae was 1.96 cm, which was significantly shorter than the commonly reported average of 2.4 cm (p<0.05). 

These findings confirm variability in duodenal anatomy, with female cadavers exhibiting slightly longer pylorus-to-major papilla distances compared to males. Such variation holds clinical relevance for gastroenterologists and surgeons, as anatomical differences can influence endoscopic navigation, surgical planning, and interpretation of gastrointestinal pathology. By improving the existing anatomical data, this research supports better procedural accuracy and contributes to medical education, with implications for early detection and management of gastrointestinal disease and procedures including an ERCP.