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Small Intestine: Junction with Stomach
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Slide 29: Pyloroduodenal junction. Note pyloric sphincter; the mucous nature of both the pyloric region gastric glands as well as Brunner's glands. The duodenal beginning is marked by the appearance of villi (more leaf-like than finger-like) and glands beneath the muscularis mucosa (submucosal= Brunner's). Diffuse lymphocytic infiltration as well as isolated nodules (as the one seen here) are often seen.