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Hamartomatous inverted polyp successfully treated by endoscopic submucosal dissection.

Masaru Odashima¹, Michiro Otaka, Hiroshi Nanjo

¹Department of Gastroenterology, Akita University School of Medicine, Akita, Japan. odashima@doc.med.akita-u.ac.jp

Internal Medicine (Tokyo, Japan)

|February 16, 2008

Summary

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Gastric hamartomatous inverted polyps are rare and hard to diagnose. Endoscopic submucosal dissection (ESD) offers a potential solution for the submucosal tumor (SMT) type, improving complete tumor resection.

Area of Science:

Gastroenterology
Surgical Oncology
Pathology

Background:

Gastric hamartomatous inverted polyps represent a rare histological subtype of gastric polyps.
Accurate diagnosis and complete resection pose significant challenges due to their varied presentations.

Observation:

A 37-year-old male presented with a gastric submucosal tumor (SMT) detected via upper gastrointestinal X-ray.
Endoscopic and endoscopic ultrasonography revealed a heterogeneous tumor in the gastric fornix with surface erosion.

Findings:

Pathological diagnosis confirmed a gastric hamartomatous inverted polyp, specifically the SMT type due to inverted submucosal growth.
Endoscopic submucosal dissection (ESD) successfully achieved complete tumor resection without complications.

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Implications:

ESD may be a viable and effective treatment option for SMT-type gastric hamartomatous inverted polyps.
This approach could overcome limitations of conventional endoscopic mucosal resection (EMR) for complete en-bloc resection.