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These patients carry a surgical or systemic history the EGD report was never built to surface. The connecting principle is simple: the diagnosis lives outside the scope findings, so the job is to ask the question that reveals it and to read post-surgical anatomy on a barium swallow before an endoscopy.
The case. A patient with severe reflux and dysphagia has absent contractility on nearly every swallow and a hypotensive lower esophageal sphincter. The reflux looks like the dominant problem. Should you offer an antireflux operation?
Topics covered
Key decisions
For the full chapter with MCQs, tables, and primary-guideline references, visit www.boardpearls.com.
Questions or feedback: hello@boardpearls.com.
Board Pearls is a gastroenterology board review built around clinical reasoning, not recall. Each episode takes one high-yield topic and works it the way you would on rounds: a case to anchor it, the framework that sorts the differential, and the specific decisions the exam rewards.
The gastroenterology series covers the full blueprint across nine modules: esophagus, stomach and duodenum, small bowel, colon, pelvic floor, liver, pancreas and biliary, endoscopy, and the cross-cutting topics. Episodes are grouped by chapter and built from the primary guidelines and pivotal trials the boards draw from (ACG, AGA, AASLD, ASGE), not from textbook summaries.
Use it as an audio companion to the written curriculum, MCQs, and AI tutor at boardpearls.com. Questions or feedback: hello@boardpearls.com.
Welcome to Board Pearls. This is episode three of three of the Esophageal Symptoms and Diagnostic Workup chapter, in the Esophageal Disorders module. In this episode we cover the post-surgical and systemic dysphagias that the standard workup misses when the algorithm is applied without modification: dysphagia after fundoplication and bariatric surgery, and the systemic disorders that reach the esophagus from outside it, from scleroderma and Sjogren to amyloid, the neuromuscular dysphagias, and chemoradiation injury.
The connecting principle is that the diagnosis lives in the history outside the EGD report. These patients carry a surgical or systemic history that the EGD-plus-manometry pathway was never built to find. The candidate's job is to ask the question that surfaces it, because the standard workup will not find what it was never asked to look for.
Post-fundoplication dysphagia presents in three patterns, and each maps to a specific mechanism and a specific next move. The Nissen wraps three hundred sixty degrees of gastric fundus around the distal esophagus. Partial wraps such as the Toupet at two hundred seventy degrees posterior and the Dor at one hundred eighty degrees anterior trade some reflux control for less postoperative dysphagia and less gas-bloat. The slipped wrap occurs when the wrap migrates onto the proximal stomach rather than encircling the distal esophagus. The result is the paradoxical combination of recurrent reflux, because the wrap no longer reinforces the lower esophageal sphincter, plus dysphagia, because the wrap now creates a relative obstruction at the gastric body. The tight wrap presents with early postoperative dysphagia. The bolus cannot pass a wrap that is too snug, and pneumatic dilation in the early postoperative period is the answer, with surgical revision reserved for dilation failure. Gas-bloat is the inability to belch with abdominal distension, and it reflects the wrap acting as a one-way valve that prevents transient lower esophageal sphincter relaxations from venting swallowed air. Telescoping is upward migration of the gastroesophageal junction through an intact wrap, reproducing both reflux and dysphagia. The first test in any of these is a barium swallow rather than an EGD. Barium shows the wrap geometry and the relationship of the gastroesophageal junction to the wrap, which EGD photos cannot reconstruct. EGD follows for direct mucosal assessment. PPI is reintroduced for slipped wraps with reflux. Dilation is the answer for the tight wrap.
Post-bariatric dysphagia divides cleanly by the operation. Sleeve gastrectomy creates a tubular stomach by stapling along the greater curvature. The anatomic vulnerability is at the incisura angularis. A kink, a twist, or a staple-line stricture produces a fixed obstruction with progressive dysphagia and food intolerance. Sleeve gastrectomy also causes or exacerbates reflux rather than relieving it. Reduced gastric volume, loss of the angle of His, disrupted sling fibers at the gastroesophageal junction, and a higher intragastric pressure environment combine to drive reflux upward. That is why sleeve is generally avoided in morbidly obese patients with established GERD, and Roux-en-Y gastric bypass is the antireflux bariatric operation of choice in that population. Roux-en-Y produces dysphagia most often through anastomotic stricture at the gastrojejunal anastomosis, presenting weeks to months after surgery with progressive solid-food intolerance. Through-the-scope balloon dilation is the treatment, often requiring multiple sessions. Marginal ulcer at the gastrojejunal anastomosis presents with epigastric pain, dysphagia, and bleeding, and the predictable risk factors are smoking (the strongest modifiable factor), NSAID use, and Helicobacter pylori. Treatment is high-dose PPI plus reversal of the modifiable factors, with surgical revision reserved for refractory or perforating ulcers.
Scleroderma esophagus is the systemic disorder with the cleanest manometric fingerprint, and the dual hit is what drives the clinical phenotype. Fibrotic replacement and dysfunction of esophageal smooth muscle produces absent or markedly weak contractions in the distal two thirds of the esophagus, where smooth muscle lives, while sparing the striated upper third. The same fibrotic process drops lower esophageal sphincter resting pressure. Peristalsis fails just as the antireflux barrier opens up. Acid pours back unimpeded, and there is no peristaltic wave to clear it. The downstream consequences are severe erosive esophagitis, peptic stricture, and Barrett esophagus in roughly five to thirty-five percent of patients. Manometry is covered in detail in chapter two, but the pattern to recognize is absent contractility on essentially all swallows combined with a hypotensive lower esophageal sphincter. That distinguishes scleroderma from achalasia, where the lower esophageal sphincter fails to relax with elevated integrated relaxation pressure. Treatment is aggressive twice-daily PPI, nocturnal head-of-bed elevation, and dilation when peptic stricture develops. Fundoplication is generally avoided, because peristalsis cannot push a bolus past a wrap. The careful reading that misleads here is to offer an antireflux operation for severe reflux, because the reflux looks like the dominant problem. The wrap fails in this patient population because the pump that has to push past it has failed first.
Sjogren syndrome produces dysphagia by removing the salivary contribution to swallowing, not by damaging the esophagus directly. Autoimmune lymphocytic infiltration of salivary and lacrimal glands reduces the lubrication and the bolus formation that swallowing depends on. Patients describe difficulty initiating a swallow with dry foods such as bread or crackers, often improved by water sips and worse at the end of the day. Treatment is salivary stimulation with pilocarpine at five milligrams four times daily or cevimeline at thirty milligrams three times daily, plus saliva substitutes and careful oral hygiene. Sjogren is also a refractory-reflux clue when it coexists with GERD, because saliva normally contributes to esophageal acid clearance, and the loss of that clearance amplifies reflux symptoms at any given acid exposure.
Amyloid causes dysphagia through infiltrative deposition of insoluble fibrils in the esophageal muscularis and submucosa. The two principal adult forms are AL light-chain amyloid in the setting of plasma cell dyscrasia, and ATTR transthyretin amyloid in either the hereditary or wild-type form. The bedside hint is macroglossia, which points toward AL in particular and warrants serum and urine immunofixation, free light chains, and a marrow biopsy in the appropriate clinical setting. Manometry is variable, because the pattern depends on where in the muscularis the fibrils have deposited. Treatment is directed at the underlying amyloidogenic process: chemotherapy or autologous stem cell transplant for AL, and tafamidis, patisiran, or inotersen for ATTR. The esophagus itself is not the target.
The neuromuscular dysphagias attack the oropharyngeal phase, and the recognition pattern lives in the systemic exam. ALS produces oropharyngeal dysphagia through degeneration of bulbar motor neurons, with fasciculations, tongue atrophy, and progressive limb weakness as the supporting findings. Electromyography shows the denervation pattern and confirms the diagnosis. Myasthenia gravis is autoimmune blockade of the postsynaptic acetylcholine receptor at the neuromuscular junction. The signature is fatigability that worsens through a meal and improves with rest, often with ptosis and diplopia. Anti-acetylcholine receptor antibodies are positive in most generalized cases, with anti-MuSK antibodies covering a subset of seronegative patients. Treatment is pyridostigmine for symptomatic relief, with immunosuppression and thymectomy for selected patients. Polymyositis and dermatomyositis are inflammatory myopathies presenting with symmetric proximal muscle weakness, elevated creatine kinase, anti-Jo-1 antibodies in a subset, and oropharyngeal dysphagia in roughly half of patients with bulbar involvement. Dermatomyositis adds the cutaneous findings (heliotrope rash on the eyelids, Gottron papules over the knuckles, shawl sign on the upper chest and back) and carries an associated malignancy risk that warrants age-appropriate cancer screening. Gastric, lung, ovarian, breast, and lymphoma cancers top that list.
Chemoradiation injury runs in two phases. Acute radiation mucositis develops during or shortly after thoracic or head-and-neck radiation, with severe odynophagia, dysphagia, and dehydration, and the management is supportive: topical anesthetics, opioid analgesia for severe cases, and nutritional support. Late radiation stricture develops months to years after radiation, with progressive solid-food dysphagia from fibrotic narrowing in the radiation field. Proactive swallow therapy during and after radiation reduces the long-term stricture rate, and endoscopic dilation, often serial, is the treatment for established stricture. Complete obstruction may require combined antegrade and retrograde rendezvous techniques.
So the through-line of the episode is that the diagnosis is recognized on the history the EGD report does not carry. The post-surgical dysphagias are recognized by the operation and read first on a barium swallow that shows the geometry rather than an EGD. The systemic dysphagias are recognized by the disease outside the GI tract, and the manometric fingerprint of scleroderma (absent contractility combined with a hypotensive lower esophageal sphincter) is the one to carry forward.
That fingerprint is where the next chapter begins. Chapter two covers esophageal motility under the Chicago Classification version four, which puts esophagogastric junction outflow first and peristalsis second, and which separates the three achalasia subtypes that each map to a specific therapy.