Heterotopic pancreas in the stomach is usually asymptomatic and benign. Here, we presented a rare case of an early gastric cancer overlying a heterotopic pancreas. A 48-year-old woman underwent esophagogastroduodenoscopy, which revealed a subepithelial mass measuring 2.0×1.5 cm on the gastric antrum with a 1-cm erosive erythematous discoloration on the surface. A biopsy specimen showed moderately differentiated tubular adenocarcinoma. Endosonography showed a heterogeneous hypoechoic mass measuring 1.3×0.6 cm, with indistinct margins in the second and third layers of the gastric wall; anechoic tubular structures within the mass were suggestive of heterotopic pancreas. Distal gastrectomy was performed, which confirmed an early gastric cancer confined to the mucosa, and a separate underlying heterotopic pancreas. Although heterotopic pancreas is most likely benign, careful endoscopic observation of the mucosal surface is necessary to avoid overlooking a coincident early gastric cancer.
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Korean J Gastrointest Endosc 2011;42(4):259-262. Published online April 28, 2011
Heterotopic pancreas is an uncommon condition that commonly occurs in the gastrointestinal tract such as the stomach and small bowel. It is defined as the presence of pancreatic tissue outside its usual location and lacking anatomical and vascular continuity with the pancreas. A heterotopic pancreas is usually found incidentally and is mostly silent; however, it rarely causes abdominal pain, weight loss, bleeding, or ileus. A 49-year-old male presented with intermittent abdominal pain for 4 weeks. We report a case with submucosal features of a jejunal heterotopic pancreas with the aid of capsule endoscopy and a histological confirmation through a single port laparoscopic segmental jejunectomy. (Korean J Gastrointest Endosc 2011;42:259-262)
The Heterotopic pancreas is defined as the presence of pancreatic tissue lacking anatomical and vascular continuity with the main body of pancreas. Heterotopic pancreas or ectopic pancreas is found in 0.55% to 13.7% of autopsy series and also found one in approximately every 500 operations in abdominal surgery. The most common sites are the antrum of stomach, duodenum, and proximal jejunum. Most masses of heterotopic pancreas in stomach were encountered in the distal one third, usually within 5 or 6 cm of pylorus. We have recently experienced a case of hetertopic pancreas that was located in fundus which is not the usual site. Gastrofiberscopy revealed a 2 2.5 cm sized protruding mass on the fundus. There was apperared an umbilical shaped dimple on the center with a relatively normal mucosa. Endoscopic ultrasonography revealed a 2.5 cm sized hypoechoic mass of fundus, originating from submucosal and muscular layer. It was considered a submucosal tumor, such as leiomyoma, and subsequently wedge resection was performed. Histologic finding showed pancreatic acni. (Korean J Gastrointest Endosc 19: 625∼628, 1999)
Heteratopic or ectopic pancreas is found in 0.5% to 13% autopsy series and also found one in approximately every 500 operations in abdominal surgery. The mast common sites are stomach (esp, greater curvature of the antrum), duodenum and proximal jejunum. Many ar most of these lesions do not cause clinical symptoms and the symptoms with heterotopie pancreas are nonspecific. When it produces complication(hemorrhage, pancreatitis, pyloric or CBD obstruction, pseudocyst, cancer etc.), the symytoms depend on the site of lesion, the size of mass, and the primary pathologic processes occurring within the heterotopic pancreatic tissue. Gaetrofiberoscopy revealed a small round, submucosal projection with a central niche or umblication, but this characteristic umbilication is not always present. The lesions are frequently confused with polyp, leiomyoma, intramural neoplasm, gastric ulcer and early gastric cancer, The tumors are predominantly intramural masses; 75 percent are submuicosal and the others are either intrsmuscular or subserosal. We have recently experienced a case of heterotopic pancreas on the antrum of greater curvature of stomach in 54-year-old man, who visited our hospital for melena. Gastrofiberoscopy revealed a 2 x 2 cm sized submucosal mass without bleeding focus and local excision was performed. Histologic finding showed a pancreatic acini within the gastric poper muscle layer.