Pedunculated inverted hyperplastic polyp of the sigmoid colon treated with endoscopic polypectomy: Endoscopic image of interest

Shoji Hirasaki, Hiromitsu Kanzaki, Seiyuu Suzuki, Atsuko Shirakawa

Research output: Contribution to journalArticle

3 Citations (Scopus)


A case of inverted hyperplastic polyp of the sigmoid colon is reported. The patient was a 67-year-old woman who visited our hospital for further evaluation of constipation. Colonoscopy revealed a pedunculated polyp with linear central depression, about 12 mm in diameter, in the sigmoid colon. Excluding the polyp, there was no lesion in the colorectum. Endoscopic polypectomy was performed. Histological examination of the specimen revealed a stalked polyp that had scattered goblet cells and elongated tubules with serrated profiles in the superficial portion. The nodules of deep tubules impinged on the muscularis mucosae. Proliferation of fibromuscular tissue was not seen in the polyp. There was no evidence of malignancy. This polyp was diagnosed as an inverted hyperplastic polyp. Pedunculated-type inverted hyperplastic polyp of the colon is rare.

Original languageEnglish
Pages (from-to)275-276
Number of pages2
JournalDigestive Endoscopy
Issue number4
Publication statusPublished - Oct 2009
Externally publishedYes



  • Colonoscopy
  • Endoscopic polypectomy
  • Inverted hyperplastic polyp

ASJC Scopus subject areas

  • Gastroenterology
  • Radiology Nuclear Medicine and imaging

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