Developmental anomalies

• Annular or ring pancreas: very rare partial or complete circling of the second part of the duodenum by pancreatic tissue, commonly causes a duodenal obstruction.
• Pancreas divisium: failure of duct fusion between the pancreatic duct and the bile duct. this condition occurs in 5-10% of individuals and patients have a increased incidence of pancreatitis, abdominal pain, jaundice, and gallbladder cancer.
• Pancreatic heterotrophia: pancreatic tissue located outside of the normal anatomical position of the gland, most commonly found in the duodenum. This is easy to mistake as a carcinoma, though in some cases adenocarcinomas have arisen in pancreatic heterotrophia patients (Mills ET AL 2007).