Inability to belch syndrome: what the gastroenterologist needs to know

Area of Science:

• Gastroenterology
• Esophageal Motility Disorders
• Otorhinolaryngology

Background:

• The inability to belch syndrome is a condition characterized by the inability to release swallowed air.
• Symptoms include chest pain, bloating, and excessive flatulence, often beginning in early childhood.

Purpose of the Study:

• To review recent publications on the inability to belch syndrome.
• To understand the pathogenesis, diagnosis, and treatment of this condition.

Main Methods:

• Review of five retrospective case series on the inability to belch syndrome.
• Analysis of a mechanistic study involving eight patients with the condition.
• Examination of the role of upper esophageal sphincter (UES) function in pathogenesis.

Main Results:

• The inability to belch syndrome typically manifests in early childhood with symptoms like chest pain, bloating, and gurgling sounds.
• Patients often self-diagnose based on online information.
• Absence of reflexogenic relaxation of the UES during esophageal distension is a key factor in its development.
• Botulinum toxin injection into the cricopharyngeus muscle shows a favorable response, aiding diagnosis.

Conclusions:

• The inability to belch syndrome is a recognized condition caused by UES dysfunction.
• Overdiagnosis is a concern due to reliance on symptoms alone.
• Further rigorous studies, including double-blind placebo-controlled trials, are needed to confirm the efficacy of botulinum toxin treatment.