Achalasia: physiology and diagnosis

Area of Science:

• Gastroenterology
• Esophageal Motility Disorders
• Immunology

Background:

• Achalasia is a rare esophageal motility disorder characterized by impaired lower esophageal sphincter relaxation and esophageal body contractions.
• Current hypotheses suggest multifactorial etiology including infectious, autoimmune, and genetic factors.
• A novel hypothesis proposes a link between eosinophilic esophagitis and achalasia pathophysiology.

Purpose of the Study:

• To explore the potential role of eosinophilic esophagitis in achalasia.
• To investigate novel diagnostic approaches for achalasia.
• To assess the impact of achalasia subtypes on therapeutic strategies.

Main Methods:

• Review of existing hypotheses and observations regarding achalasia etiology.
• Discussion of high-resolution manometry findings and classification of achalasia types.
• Evaluation of provocative maneuvers (e.g., rapid drinking challenge) and timed barium swallow.

Main Results:

• A muscular form of eosinophilic esophagitis may contribute to achalasia by affecting the myenteric plexus.
• High-resolution manometry identifies three achalasia types, with a potential subset exhibiting normal sphincter relaxation.
• Provocative maneuvers and timed barium swallow show diagnostic and predictive value.

Conclusions:

• Eosinophilic esophagitis is a potential contributing factor in some achalasia cases.
• Advanced diagnostic tools like rapid drinking challenges and timed barium swallow improve achalasia diagnosis.
• Further research is needed to determine the long-term impact of achalasia subtypes on tailored therapies.