Korean J Gastroenterol.  2016 Feb;67(2):98-102. 10.4166/kjg.2016.67.2.98.

Inverted Hyperplastic Polyp in Stomach: A Case Report and Literature Review

• Lee YH
• Joo MK
• Lee BJ
• Lee JA
• Kim T
• Yoon JG
• Lee JM
• Park JJ

• KMID: 2383548
• DOI: http://doi.org/10.4166/kjg.2016.67.2.98

Abstract

An inverted hyperplastic polyp (IHP) found in stomach is rare and characterized by downward growth of hyperplastic mucosal component into the submucosa. Because of such characteristic, IHP can be misdiagnosed as subepithelial tumor or malignant tumor. In fact, adenocarcinoma was reported to have coexisted with gastric IHP in several previous reports. Because only 18 cases on gastric IHP have been reported in English and Korean literature until now, pathogenesis and clinical features of gastric IHP and correlation with adenocarcinoma have not been clearly established. Herein, we report a case of gastric IHP which was initially misdiagnosed as gastrointestinal stromal tumor and resected using endoscopic submucosal dissection. Literature review of previously published case reports on gastric IHP is also presented.

Keyword

Inverted hyperplastic polyp; Stomach; Endoscopic submucosal dissection

MeSH Terms

Adult
Gastric Mucosa/pathology/surgery
Humans
Hyperplasia/*diagnosis/diagnostic imaging
Male
Polyps/pathology/surgery
Stomach/diagnostic imaging
Stomach Neoplasms/diagnosis/diagnostic imaging/pathology
Tomography, X-Ray Computed
Ultrasonography