An 84-year-old Japanese man presented with abdominal fullness and anorexia in September 2006. Computed tomography demonstrated extension of the stomach and the duodenum with a thickened wall. It showed marked dilatation of the main pancreatic duct (MPD) (A; arrowhead) and fistulization into the stomach (A; arrow) and the duodenum (B; arrow). Endoscopic examination demonstrated the skip ulcerati...

â  the ampulla of vater is commonly located in the posteromeâ­dial wall of the second portion of the duodenum. at times, the ampulla of vater may be found at uncommon sites such as the third and fourth portions of the duodenum, the duodenal bulb and the stomach. we found the ampulla of vater in the pyloric channel in a 44 year old patient who had undergone surgery for acute cholecystitis. an in...

How cells integrate multiple patterning signals to achieve early endoderm regionalization remains largely unknown. Between gastrulation and neurulation, retinoic acid (RA) signaling is required, while Wnt/β-catenin signaling has to be repressed for the specification of the pancreas, oesophagus, stomach, and duodenum primordia in Xenopus embryos. In attempt to screen for RA regulated genes in Xe...