Residency · Residency · Cardiothoracic Surgery

Management of Benign Esophageal Disease

Overview

Benign esophageal conditions encompass a broad range of pathology including motility disorders, structural abnormalities, and emergent perforations. Thoracic surgeons play a central role in the surgical management of achalasia, paraesophageal hernias, esophageal diverticula, and esophageal perforation. Careful preoperative evaluation with manometry, pH testing, and contrast studies is essential for accurate diagnosis and operative planning. Minimally invasive approaches have become the standard for most elective benign esophageal procedures.

Achalasia

Pathophysiology

Achalasia results from degeneration of the inhibitory neurons that produce nitric oxide in the myenteric (Auerbach) plexus. This degeneration leads to failure of lower esophageal sphincter (LES) relaxation and absent esophageal peristalsis. The precise etiology remains unknown, though autoimmune, viral, and neurodegenerative theories have all been proposed. Importantly, pseudoachalasia caused by malignancy -- particularly gastroesophageal junction (GEJ) cancer -- must always be excluded before attributing symptoms to primary achalasia.

Diagnosis

The classic finding on barium swallow is a "bird's beak" appearance at the GEJ with a dilated proximal esophagus. High-resolution manometry (HRM) is the gold standard for diagnosis and uses the Chicago Classification v4.0 to categorize achalasia into three subtypes: Type I features absent peristalsis with no pressurization (classic achalasia), Type II shows panesophageal pressurization and has the best treatment response, and Type III is characterized by spastic contractions and carries the worst treatment response. The integrated relaxation pressure (IRP) is elevated above 15 mmHg in achalasia. Upper endoscopy (EGD) is performed to exclude pseudoachalasia from malignancy and to evaluate mucosal status. The timed barium esophagram (TBE) quantifies esophageal emptying and is particularly useful for follow-up assessment after treatment.

Treatment Options

Heller Myotomy

The Heller myotomy is performed via a laparoscopic (standard) or robotic approach and involves division of the circular and longitudinal muscle fibers of the distal esophagus over a length of 6-8 cm, extending 2-3 cm onto the gastric cardia. An anterior partial fundoplication (Dor) is added to prevent reflux and is preferred over the Toupet because it covers the exposed mucosa. This procedure achieves 85-95% symptom relief at 5 years, with a mucosal perforation rate of 5-10% that is typically recognized and repaired intraoperatively. Results are excellent for Type I and II achalasia but less reliable for Type III.

Peroral Endoscopic Myotomy (POEM)

POEM is an endoscopic approach in which a submucosal tunnel is created and the myotomy is performed from within the tunnel. The surgeon can perform a selective circular myotomy or a full-thickness myotomy, and a longer myotomy is possible, which is advantageous for Type III (spastic) achalasia. The tradeoff is a significantly higher post-procedure GERD rate of 40-60% because no antireflux procedure is performed. Short-term dysphagia relief is equivalent to Heller myotomy, though long-term data are still accumulating.

Achalasia Treatment Options Comparison

Pneumatic Dilation

Graded balloon dilation of the LES using 30, 35, and 40 mm balloons achieves 60-85% efficacy at 5 years, though repeat dilations may be necessary. The perforation risk is 1-3% per dilation session. This approach is best reserved for patients who are poor surgical candidates.

Botulinum Toxin Injection

Endoscopic injection of botulinum toxin into the LES provides a temporary effect lasting only 3-6 months. It is reserved for patients unfit for surgery or dilation, and repeated injections cause submucosal fibrosis that can complicate future myotomy.

<image>Comparison of Heller myotomy with Dor fundoplication versus POEM procedure for achalasia, showing extent of myotomy and antireflux mechanism</image>

Paraesophageal Hernia

Classification

Hiatal hernias are classified into four types. Type I is a sliding hiatal hernia in which the GEJ migrates above the diaphragm and is the most common type, accounting for 95% of cases. Type II is a true paraesophageal (rolling) hernia where the GEJ remains in its normal position while the fundus herniates alongside it. Type III is a mixed hernia combining features of Types I and II and is the most common type referred to as a "paraesophageal" hernia. Type IV involves a large hernia sac containing other organs such as the colon, spleen, or omentum.

Indications for Repair

Symptomatic paraesophageal hernias (Types II-IV) should be repaired when patients experience dysphagia, postprandial pain, chest pain, early satiety, chronic anemia from Cameron ulcers, or recurrent aspiration. The management of asymptomatic large paraesophageal hernias remains controversial, but repair is generally recommended for fit patients due to the risk of incarceration and volvulus. Emergency repair is required for acute gastric volvulus with obstruction, ischemia, or perforation.

Surgical Technique

The laparoscopic approach is standard. The key steps proceed in sequence: first, the hernia sac and its contents are reduced from the mediastinum; second, the hernia sac is completely excised; third, the esophagus is adequately mobilized to achieve at least 3 cm of intra-abdominal esophageal length; fourth, the crura are closed posteriorly with interrupted permanent sutures (posterior cruroplasty); fifth, mesh reinforcement of the crural closure may be considered, though this remains controversial because it reduces recurrence but carries a risk of erosion; sixth, a fundoplication (Nissen or partial) is performed to anchor the GEJ and prevent reflux; and seventh, a Collis gastroplasty is considered if the esophagus is foreshortened with less than 3 cm of intra-abdominal length.

Outcomes and Recurrence

Symptomatic relief exceeds 90%. Radiographic hernia recurrence ranges from 15-40%, though many recurrences are small and asymptomatic. Symptomatic recurrence occurs in only 5-10% of cases. While mesh use reduces radiographic recurrence, the risk of esophageal erosion has limited its widespread adoption.

<image>Classification of hiatal hernias Types I-IV showing relationship of GEJ and stomach fundus to the diaphragm in each type</image>

Esophageal Diverticula

Zenker Diverticulum (Pharyngoesophageal)

Zenker diverticulum is a pulsion diverticulum that forms through Killian triangle, the area of weakness between the thyropharyngeus and cricopharyngeus muscles. The underlying pathophysiology involves cricopharyngeal dysfunction with increased pharyngeal pressure. Patients present with dysphagia, regurgitation of undigested food, halitosis, and aspiration. Treatment options include an open approach with cricopharyngeal myotomy (with or without diverticulectomy or diverticulopexy) or an endoscopic (Dohlman) approach using a stapler to divide the common wall between the diverticulum and the esophagus, effectively performing a cricopharyngeal myotomy. The endoscopic approach is preferred for most patients.

Epiphrenic Diverticulum

Epiphrenic diverticulum is a pulsion diverticulum of the distal esophagus that is associated with an underlying motility disorder (achalasia, diffuse esophageal spasm, or hypertensive LES) in 50-75% of cases. These diverticula are often asymptomatic and found incidentally. Surgery is indicated when the diverticulum is symptomatic (causing dysphagia, regurgitation, or aspiration) and large (greater than 5 cm). Treatment consists of laparoscopic or thoracoscopic diverticulectomy combined with myotomy to address the underlying motility disorder, plus a partial fundoplication. A critical technical point is that the myotomy must be performed on the opposite side of the esophagus from the diverticulectomy to avoid disrupting the staple line. Preoperative manometry is mandatory to guide the myotomy.

Midesophageal (Traction) Diverticulum

Midesophageal diverticula are true diverticula involving all layers of the esophageal wall. They were historically caused by mediastinal lymph node inflammation from tuberculosis pulling on the esophageal wall. These are usually asymptomatic and rarely require treatment. Resection is only necessary if the diverticulum becomes symptomatic or develops a complication such as a fistula.

Esophageal Perforation (Boerhaave Syndrome)

Etiology

Boerhaave syndrome refers to spontaneous perforation of the esophagus from forceful emesis (postemetic rupture), with the classic location being the left posterolateral distal esophagus. Iatrogenic injury is actually the most common cause of esophageal perforation overall, occurring during EGD, dilation, stenting, or transesophageal echocardiography. Other causes include penetrating or blunt traumatic injury, foreign body ingestion, and malignant tumor erosion through the esophageal wall.

Clinical Presentation

The Mackler triad of Boerhaave syndrome consists of vomiting, chest pain, and subcutaneous emphysema. Patients develop tachycardia, fever, and sepsis. Left pleural effusion is common with distal perforations. Hamman sign -- a mediastinal crunching sound heard on auscultation -- may be present. Imaging reveals pneumomediastinum and pneumothorax.

Diagnosis

CT with oral water-soluble contrast is the most sensitive study, demonstrating extraluminal contrast, pneumomediastinum, and pleural effusion. Chest X-ray may show pneumomediastinum, subcutaneous emphysema, and pleural effusion. An esophagram using Gastrografin followed by barium can identify the exact location of the leak.

Management Principles

The time from perforation to treatment is the critical determinant of outcome. When the perforation is recognized within 24 hours, primary repair is usually achievable. Beyond 24 hours, tissue edema, inflammation, and mediastinal contamination complicate repair significantly.

Treatment Options

Primary repair is appropriate when the perforation is less than 24 hours old and contained. The technique involves debridement of devitalized tissue, two-layer closure (mucosal and muscle layers), buttressing with an intercostal muscle flap, pleural flap, or fundoplication, wide mediastinal and pleural drainage, and establishment of feeding access via jejunostomy.

When the perforation is older than 24 hours with severe contamination, esophageal diversion and exclusion may be necessary. This involves creating a cervical esophagostomy, stapling the distal esophagus, and placing a gastrostomy and jejunostomy, with delayed reconstruction planned months later. This approach is reserved for severely septic patients with a non-salvageable esophagus.

Endoscopic management options are increasingly utilized. Covered esophageal stents are used for contained perforations. Endoscopic vacuum therapy (E-VAC), in which an endosponge is placed through the perforation site with continuous suction, promotes healing from the inside out. Endoscopic clips can manage small perforations.

Conservative management following the Cameron criteria involves keeping the patient NPO with antibiotics and drainage of collections. This is appropriate when the perforation is contained, there is no sepsis, and drainage flows back into the esophagus.

<image>Management algorithm for esophageal perforation based on timing (early vs. late), degree of contamination, and patient stability</image>

Clinical Pearls

Manometry is mandatory before any antireflux surgery or esophageal diverticulectomy because undiagnosed motility disorders lead to disastrous outcomes. In achalasia, pseudoachalasia must always be excluded with EGD and appropriate imaging, especially in patients over 60 years with rapid symptom onset. POEM produces excellent dysphagia relief but significantly higher GERD rates, so patients need long-term PPI therapy and surveillance. For paraesophageal hernia repair, achieving adequate intra-abdominal esophageal length of at least 3 cm is critical, and a Collis gastroplasty should be considered for short esophagus. Esophageal perforation is a surgical emergency -- the old teaching that "the sun should never set on an esophageal perforation" still holds, though endoscopic management has expanded the available options. Endoscopic vacuum therapy (E-VAC) is emerging as a highly effective tool for managing esophageal perforations and anastomotic leaks. Finally, performing an epiphrenic diverticulectomy without addressing the underlying motility disorder leads to recurrence or staple line blowout.

References

• Zaninotto G et al. "The 2018 ISDE achalasia guidelines." Dis Esophagus. 2018.
• Werner YB et al. "Endoscopic or surgical myotomy in patients with idiopathic achalasia." N Engl J Med. 2019.
• Luketich JD et al. "Outcomes after laparoscopic repair of paraesophageal hernia." Ann Surg. 2010.
• Brinster CJ et al. "Evolving options in the management of esophageal perforation." Ann Thorac Surg. 2004.
• Laukoetter MG et al. "Endoscopic vacuum therapy for esophageal perforation." Ann Surg. 2017.

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