The spectrum of radiographic features of aberrant pancreatic rests involving the stomach.

The radiographic features of 20 cases of pathologically confirmed heterotopic pancreatic rests involving the stomach were analyzed. Aberrant pancreatic tissue in the stomach produces a broader spectrum of radiographic findings than had been thought. The mass produced by the aberrant tissue is often larger and more sessile than usually anticipated, and may simulate a mural neoplasm or adenomatous polyp. While most cases occur in the distal antrum or prepyloric area, some occur in the more proximal portion of the antrum. Less than half of the cases in this series included the finding of a small central niche. When a niche was present, it was often large in relation to the mass, and simulated a gastric ulcer or ulcerating neoplasm.