Diagnosing gastroesophageal reflux disease: the pathologist's perspective

Area of Science:

• Gastroenterology
• Pathology

Background:

• Gastroesophageal reflux disease (GERD) is a prevalent condition with complex diagnostic challenges.
• While clinical symptoms, endoscopy, and pH monitoring aid diagnosis, they can yield conflicting results.
• Histology is crucial for diagnosing nonerosive reflux disease (NERD), where endoscopic findings are minimal.

Purpose of the Study:

• To review the diagnostic strengths and limitations of histological features in reflux esophagitis.
• To highlight the need for rigorously tested minimal biopsy criteria for GERD diagnosis.
• To emphasize the pathologist's role in interpreting esophageal biopsies for GERD.

Main Methods:

• Review of current diagnostic modalities for GERD, including clinical, endoscopic, pH monitoring, and histological assessments.
• Analysis of key histological findings in reflux esophagitis: basal cell hyperplasia, papilla elongation, inflammation, and intercellular space dilatation.
• Discussion of the sensitivity and specificity challenges associated with current histological criteria.

Main Results:

• No single gold standard exists for GERD diagnosis, with tests often providing conflicting data.
• Histological features of GERD, while informative, exhibit variable sensitivity and specificity.
• Minimal biopsy criteria for reflux esophagitis require further validation in well-characterized patient cohorts.

Conclusions:

• Pathologists frequently encounter esophageal biopsies for GERD evaluation and must understand the limitations of histological interpretation.
• Accurate histological diagnosis of GERD, especially NERD, remains challenging due to the variability of features.
• Future research and novel techniques are needed to enhance histological diagnostic accuracy and establish robust criteria for reflux esophagitis.