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Difficulty: HardGastroenterology and Hepatology

Match the following clinical presentations and corresponding high-resolution manometry (HRM) metrics to the most appropriate esophageal motility disorder.

  • Progressive dysphagia to solids and liquids with weight loss; HRM reveals an elevated integrated relaxation pressure (IRP > 15 mmHg) and 100% absent distal peristalsis.Achalasia (Type I)
  • Intermittent, noncardiac chest pain triggered by cold liquids; HRM reveals a normal IRP (< 15 mmHg) with ≥20% of swallows demonstrating premature contractions and reduced distal latency.Distal Esophageal Spasm (DES)
  • Severe heartburn and dysphagia in a patient with fingertip skin thickening; HRM reveals a profound hypotensive lower esophageal sphincter (LES) and absent peristalsis in the smooth muscle esophagus.Systemic Sclerosis (Scleroderma) Esophagopathy
  • Severe retrosternal pain during meals; HRM reveals a normal IRP with ≥20% of swallows demonstrating an extreme distal contractile integral (> 8,000 mmHg·s·cm).Hypercontractile (Jackhammer) Esophagus

Answer

Achalasia pairs with elevated IRP and absent peristalsis; Distal Esophageal Spasm pairs with normal IRP and premature contractions; Systemic Sclerosis pairs with hypotensive LES and absent smooth muscle peristalsis; Jackhammer Esophagus pairs with excessively vigorous contractions.
High-resolution manometry relies on the integrated relaxation pressure (IRP) to distinguish outflow obstructions like achalasia (elevated IRP) from other disorders. Distal latency and distal contractile integral (DCI) further differentiate spastic and hypercontractile states, while LES hypotension is specific to scleroderma.

Step-by-Step Solution

1
Analyze the Integrated Relaxation Pressure (IRP) for each clinical presentation.
Only the first presentation has an elevated IRP (> 15 mmHg).
An elevated IRP is the defining manometric feature of esophagogastric junction outflow obstruction. When paired with aperistalsis, it diagnostic for Achalasia.
2
Evaluate the distal contractile patterns in the remaining presentations with normal IRP.
Premature contractions (reduced distal latency) identify Distal Esophageal Spasm, while extreme contractile vigor (DCI > 8,000) identifies Jackhammer esophagus.
Differentiating spastic esophageal disorders strictly requires assessing the timing and strength of peristalsis via Chicago Classification criteria.
3
Correlate LES resting pressure abnormalities with associated systemic symptoms.
The hypotensive LES with aperistalsis matches the presentation involving skin thickening (Raynaud/sclerodactyly).
Systemic sclerosis causes fibrous replacement of esophageal smooth muscle, resulting in a weak LES and absent distal contractility, distinguishing it from achalasia where the LES fails to relax.

Key Concept

Interpretation of High-Resolution Esophageal Manometry (Chicago Classification)
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Topics

Gastroenterology and Hepatology

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