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Tumor stricture type (1). (A). A tumor with an irregular margin (arrow heads) occupies the pancreatic parenchyma. The main pancreatic duct cannot be identified. A dilated duct (arrow) is the branch pancreatic duct. (B). The tumor consists of dense fibrous tissue with small irregular glands. The epithelium of the gland is severely dysplastic and the gland is a so-called cancer pseudogland. (H.E., ×100).
