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Updated: Aug 6, 2026

Intraoperative Gastroscopy for Tumor Localization in Laparoscopic Surgery for Gastric Adenocarcinoma
Published on: August 9, 2016
Laparoendoscopic techniques for occult gastrointestinal bleeding
1Department of Surgery, The George Washington University Medical Center, Washington, DC 20037, USA.
Diagnosing obscure gastrointestinal bleeding, often from small bowel arteriovenous malformations (AVMs), remains challenging. Intraoperative endoscopy offers a definitive solution for identifying and treating these elusive bleeding sources.
Area of Science:
- Gastroenterology
- Surgical Innovation
- Diagnostic Imaging
Background:
- Occult gastrointestinal bleeding between the ligament of Treitz and ileocecal valve presents diagnostic challenges.
- Existing diagnostic modalities like endoscopy, nuclear scans, and angiography have limitations.
Observation:
- An 18-year-old male presented with obscure gastrointestinal bleeding.
- A comprehensive diagnostic workup included multiple endoscopic procedures, nuclear scans, video capsule endoscopy, and angiography.
- Conventional methods failed to pinpoint the bleeding source.
Findings:
- Arteriovenous malformations (AVMs) in the small bowel were identified as the source of bleeding.
- Intraoperative endoscopy, performed via a small bowel enterotomy, successfully located the AVMs.
- Resection of the identified AVMs resolved the gastrointestinal bleeding.
Implications:
- Intraoperative endoscopy is a valuable technique for diagnosing and treating obscure gastrointestinal bleeding.
- This approach can overcome the limitations of standard diagnostic tools for small bowel pathology.
- Effective management of AVMs can significantly improve patient outcomes in cases of obscure GI bleeding.
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