Match each patient's clinical and high-resolution manometry (HRM) presentation with the most accurate underlying pathophysiologic mechanism.
- A 38-year-old man presents with progressive dysphagia to solids and liquids. High-resolution manometry demonstrates an elevated integrated relaxation pressure (IRP) with 100% failed peristalsis.Degeneration of inhibitory ganglionic cells (producing nitric oxide and VIP) in the Auerbach plexus, preventing sphincter relaxation.
- A 52-year-old woman is evaluated for episodic noncardiac chest pain. Manometry reveals normal lower esophageal sphincter relaxation but premature contractions with a distal latency of less than 4.5 seconds in 30% of swallows.Defective inhibitory innervation isolated to the esophageal body, causing premature, simultaneous, and uncoordinated smooth muscle contractions.
- A 45-year-old woman with a history of Raynaud phenomenon presents with severe heartburn. Manometry shows a markedly hypotensive lower esophageal sphincter and completely absent peristalsis in the distal two-thirds of the esophagus.Progressive atrophy of esophageal smooth muscle with subsequent collagenous fibrous tissue replacement, leading to aperistalsis and sphincter incompetence.
- A 28-year-old man with allergic rhinitis presents with an acute solid food impaction. Endoscopy reveals multiple stacked circular rings, and biopsy shows dense infiltration of bilobed leukocytes.Th2-helper T cell mediated allergic inflammatory response involving interleukin-5 and eotaxin-3, leading to mucosal remodeling.
- A 61-year-old man reports intense retrosternal pain during meals. Manometry demonstrates normal sphincter relaxation but reveals multi-peaked, hypercontractile swallows with a distal contractile integral (DCI) exceeding 8,000 mmHg·s·cm.Excessive excitatory cholinergic drive to the esophageal smooth muscle, resulting in extreme, prolonged, and hypervigorous contractions.
Cevap
The correct matches map each distinct clinical and manometric presentation to its precise underlying pathophysiology: Achalasia to inhibitory ganglionic cell degeneration, Distal Esophageal Spasm to isolated defective inhibitory innervation causing premature contractions, Scleroderma to smooth muscle atrophy and fibrosis, Eosinophilic Esophagitis to Th2-mediated inflammation, and Jackhammer Esophagus to excessive excitatory cholinergic drive.
Each correct pairing matches the pathognomonic diagnostic findings (clinical, manometric, or endoscopic) of a major esophageal disorder to its precise etiologic mechanism. Achalasia requires a loss of inhibitory innervation leading to failure of LES relaxation (elevated IRP). Distal Esophageal Spasm involves localized inhibitory defects causing premature contractions. Scleroderma physically replaces smooth muscle with fibrosis, leading to low LES pressure and absent motility. Eosinophilic esophagitis is a Th2-mediated structural disease, and Jackhammer esophagus represents extreme cholinergic excitatory drive causing massive contractile vigor without altering LES relaxation.
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Anahtar Kavram
Pathophysiology and High-Resolution Manometry Interpretations of Esophageal Motility Disorders