Endoscopic Pyloromyotomy for Gastroparesis After Esophagectomy

Gastroparesis can develop after an oesophagectomy when the stomach is repositioned as a gastric conduit. Symptoms may include early satiety, post-meal fullness, nausea, vomiting, reflux, weight loss and difficulty maintaining oral nutrition. A narrowed or poorly relaxing pylorus is one possible contributor, although delayed emptying may also reflect vagal nerve injury, conduit angulation, anastomotic problems or mechanical obstruction.

Endoscopic pyloromyotomy, often called gastric peroral endoscopic myotomy or G-POEM, is a minimally invasive treatment designed to divide the pyloric muscle. In patients with altered anatomy after oesophagectomy, careful assessment is essential. The procedure may be considered when symptoms and objective testing suggest pyloric dysfunction and medication, dietary measures or less invasive interventions have not provided adequate relief.

Why Delayed Emptying Can Follow Oesophagectomy

During oesophagectomy, the stomach is commonly shaped into a narrow conduit and moved into the chest to restore continuity with the remaining oesophagus. This reconstruction can interrupt vagal nerve function, alter gastric geometry and affect the coordinated contractions that move food towards the pylorus. The pyloric muscle may remain tight, creating resistance at the outlet of the gastric conduit.

Symptoms can resemble reflux, functional dyspepsia or recurrent cancer-related illness. A patient may report regurgitation after meals, coughing at night, bloating, retching or an inability to tolerate solid food. In Australia, these symptoms may first be managed through a general practitioner, then assessed by a gastroenterologist and upper gastrointestinal surgical team in a tertiary centre such as those in Sydney, Melbourne or Brisbane.

Assessment Before Pyloromyotomy

Diagnosis should combine the clinical history with structural and functional testing. Endoscopy can identify anastomotic narrowing, retained food, ulceration or a tight pylorus. Contrast studies may show delayed passage or conduit angulation, while a gastric emptying study can provide objective evidence of impaired emptying. Some centres also use EndoFLIP or other measurements of pyloric distensibility, although availability differs between hospitals.

A multidisciplinary review is particularly valuable after oesophagectomy. The team may include an upper gastrointestinal surgeon, therapeutic endoscopist, radiologist, dietitian and specialist nurse. Before G-POEM, clinicians should exclude obstruction, severe conduit twisting, a recurrent tumour or a problem that would be better treated with dilation, stenting, revision surgery or nutritional support.

Assessment commonly considers:

• Symptom pattern, nutritional status and weight trend
• Endoscopic and radiological evidence of obstruction
• Gastric emptying or pyloric function testing
• Previous pyloric interventions, including Botox or surgical drainage

How The Endoscopic Procedure Works

G-POEM is performed through the mouth under sedation or general anaesthesia. The endoscopist creates a small mucosal entry point in the stomach, advances through a submucosal tunnel and cuts selected fibres of the pyloric sphincter. The entry site is then closed with clips or another closure device. By reducing outlet resistance, the procedure aims to improve drainage from the gastric conduit.

Post-oesophagectomy anatomy can make orientation and tunnel placement more complex. The conduit may be narrow, elevated into the chest or affected by adhesions and prior surgical changes. The endoscopist therefore needs experience with therapeutic upper gastrointestinal procedures and altered anatomy. Access may be organised through a public hospital pathway or a private service, with costs, waiting times and eligibility varying across Australian states and territories.

Potential Benefits And Limitations

Published experience suggests that pyloromyotomy can reduce nausea, vomiting, food retention and post-meal discomfort in selected patients. It may improve oral intake and reduce dependence on feeding support. However, evidence specifically involving patients after oesophagectomy remains limited, with much of the available research based on small retrospective series or mixed gastroparesis populations.

The procedure does not correct every cause of delayed emptying. Symptoms may persist when the main problem is poor gastric conduit motility, severe reflux, mechanical angulation or an anastomotic stricture. Possible adverse events include bleeding, infection, capnoperitoneum, mucosal injury and ulceration. Some patients may develop worsened bile or alkaline reflux because the pylorus offers less resistance to duodenal contents.

Recovery, Follow-Up And Local Care

After the procedure, patients are commonly observed in hospital, initially receiving liquids before progressing to a soft or modified diet. The exact pathway depends on the patient’s nutritional status, comorbidities and the complexity of the original cancer surgery. Dietitians can help maintain protein and calorie intake while symptoms settle, particularly when weight loss has already occurred.

Follow-up should assess vomiting, meal tolerance, reflux, hydration, body weight and the need for enteral nutrition. In rural and regional Australia, travel to a metropolitan endoscopy unit may complicate review, so shared care with local hospitals and the patient’s GP can be important. Public referral pathways and private self-funded options also differ, and Medicare coverage should be confirmed before treatment because procedural billing and associated hospital costs may vary.

Important follow-up priorities include:

• Gradual dietary progression guided by the treating team
• Monitoring for bleeding, fever, severe pain or persistent vomiting
• Review of reflux symptoms and nutritional intake
• Repeat functional testing when improvement is uncertain

For suitable patients, endoscopic pyloromyotomy offers a less invasive way to address pyloric resistance after oesophagectomy. It should be selected after structural causes have been excluded and discussed within an experienced multidisciplinary service. The key point is that delayed emptying after oesophagectomy has several possible causes, so successful treatment depends on matching the intervention to the underlying anatomy and physiology.