Related Experiment Video
Updated: Aug 2, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
[Endoscopic findings of GERD]
1Department of Gastroenterology, Toranomon Hospital.
The Los Angeles classification for reflux esophagitis is insufficient, as most heartburn patients showed minimal or no endoscopic findings. New grades (M for minimal, N for no lesions) are proposed to improve classification accuracy.
Area of Science:
- Gastroenterology
- Endoscopy
- Esophageal Diseases
Context:
- The Los Angeles classification is the standard for grading reflux esophagitis based on endoscopic mucosal breaks.
- Current classification may not accurately represent the spectrum of findings in patients experiencing heartburn, particularly in certain populations like those in Japan.
Purpose:
- To evaluate the adequacy of the Los Angeles classification in patients with heartburn.
- To propose an improved endoscopic classification system for reflux esophagitis.
Summary:
- A study found that only 14.3% of patients with heartburn presented with Grade A to D findings according to the Los Angeles classification.
- This suggests the current system is insufficient for diagnosing reflux esophagitis in this cohort.
- The study proposes incorporating 'minimal change' (Grade M) and 'no lesions' (Grade N) into the classification.
Impact:
- Enhancing the diagnostic accuracy of reflux esophagitis.
- Improving patient management and treatment strategies for GERD.
- Providing a more comprehensive classification system for endoscopic evaluation of the esophagus.
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