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A Case of Pseudoinvasion in Peutz-Joshers Polyposis
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KMID : 0357919930270010072
Abstract
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Peutz-Jeghers polyp with pseudoinvasion is characterized by the presence of mucosal
islands within muscle layer often associated with mucinous cysts. It occurs when
mucosal components completely penetrate the muscularis propria, and shows no cytologic
signs of malignancy. In most instances, the lesion may be the result of forces exerted
during intussusception in the involved small intestine.
We describe a case of Peutz-Jeghers polyposis with Pseudoinvasion in a 24-year-old
female patient. this patient presented with intussusception and a segmental resection of
the ileum was performed. Microscopically, it disclosed a hamartomatous Polyp with
pseudoinvasion. There were g1andular islands and mucinous cysts embedded within the
bundle of muscle layer, extending to the subserosa. There was no evidence of cellular
dysplasia or desmoplasia. (Korean J Pathol 1993; 27: 72¡74)
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Peutz-Jeghers polyp; Pseudoinvasion; Small intestine;
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