潰瘍を形成した胃 hamartomatous inverted polyp の 1 例

Translated title of the contribution: GASTRIC HAMARTOMATOUS INVERTED POLYP WITH ULCERATION

Shunsuke Takahashi, Risa Iwao, Chihoko Aratono, Norikazu Hashimoto, Soushi Imamura, Hitoshi Honma, Hiroyuki Kuwano, Shinya Umekita, Taisuke Sasaki, Yoshinao Oda

Research output: Contribution to journalArticlepeer-review

Abstract

A 66-year-old man was referred to our hospital for further evaluation of a polypoid lesion of the stomach detected on radiographic examination. Esophagogastroduodenoscopy revealed a broad-based elevated lesion (24mm) with a relatively steep but smooth surface and submucosal tumor-like morphology in the upper body of the stomach, with an edematous red apex and a shallow ulcer. Endoscopic ultrasonography revealed a lesion of low echogenicity with multiple aechoic images in the mucosal-submucosal layers, and we performed endoscopic resection using a snare followed by circumferential incision and submucosal dissection using ESD techniques. Histopathological examination of the resected specimen revealed that the polypoid lesion was composed of submucosal proliferation of cystically dilated gastric glands and fibromuscular elements. Based on these findings, we diagnosed the tumor as a hamartomatous inverted polyp (HIP). Only six cases (including the current case) of HIP with ulceration have been reported in Japan, which indicates the rarity of this form of HIP. The atypical ulcer observed in this case of HIP was probably attributable to mechanical stimulation. HIP is rare and is known to be complicated by cancer. Therefore, preoperative diagnosis is invariably challenging, and it is important to carefully devise the optimal treatment strategy.

Translated title of the contributionGASTRIC HAMARTOMATOUS INVERTED POLYP WITH ULCERATION
Original languageJapanese
Pages (from-to)2268-2274
Number of pages7
JournalGASTROENTEROLOGICAL ENDOSCOPY
Volume64
Issue number10
DOIs
Publication statusPublished - 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Gastroenterology

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