Endoscopic Mucosal Resection (EMR)

EMR is a very effective, minimally invasive treatment used to remove early-stage cancer or precancerous lesions of the intestinal lining. In cases where doctors identify some abnormalities in the oesophagus, the EMR can enable them to excise the affected tissue properly without the patient having to undergo major surgery. When doctors detect irregularities in the oesophagus, EMR allows them to precisely remove the affected tissue without subjecting the patient to major surgery. This technique serves both to treat the problem and to diagnose it. After the tissue is removed, it's carefully examined in the lab to determine the disease’s stage.

This article will discuss the clinical indications for EMR, the technical procedures involved, and the overall care provided at Gleneagles Hospitals to achieve a safe and effective recovery.

The oesophageal wall is composed of several layers. Most oesophageal cancers begin in the innermost layer, known as the mucosa. When cancer is detected early, before it has entered the deeper muscle layers, the lesion or early-stage cancer can be removed using endoscopic techniques.

EMR particularly targets a specific category of superficial lesions. The procedure uses an endoscope, a flexible tube equipped with a camera and surgical tools, which lets doctors see and reach the affected area without making large cuts. It’s a way to get a closer look and work inside the body without making extensive incisions. It involves injecting fluid into the lesion, raising it, and then snaring it away with electrical current, often preventing the need for major surgery and allowing for faster recovery. EMR has diagnostic applications, and it is possible to collect tissue samples for further analysis.

Experts at Gleneagles Hospitals suggest EMR in special cases where abnormal growth is attached to the oesophageal wall. Key indications include:

• Barrett’s Oesophagus with Dysplasia: This is a condition in which the mucosal lining of the oesophagus changes as a result of chronic acid reflux. EMR removes areas with high-grade dysplasia (precancerous cells) to prevent them from developing into cancer.
• Early-stage gastrointestinal cancers: In the case of small-sized tumours, which have not yet spread beyond the mucosa, EMR can be used as curative therapy.
• Diagnostic Staging: In some cases, EMR is performed to obtain a larger sample than a standard biopsy. This helps the medical team determine the extent to which the cancer has penetrated, which in turn influences the remaining treatment strategy.

The core principle of Endoscopic Mucosal Resection (EMR) remains the same; the approach is modified by specialists based on the lesion's size, shape, and location. These variations ensure the most effective removal of abnormal tissue while protecting the underlying layers of the oesophageal wall.

The following techniques are commonly utilised:

• Standard EMR (Injection-Assisted): In this procedure, the expert injects a sterile solution under the lesion to create a cushion of liquid. This increases the distance between the anomaly and the deeper muscle layers, allowing it to be removed with a wire snare without injuring the deeper muscles.
• Suction or Cap-Assisted EMR: The doctor uses a specific cap and suction to detach the abnormal tissue from the wall and remove it. This is especially applicable to the inaccessible lesions.
• Hybrid Techniques: In complex cases, a surgeon can employ a combination of EMR and ESD procedures to make a complete removal possible while remaining safe for the patient.

Endoscopic mucosal resection is a significantly less invasive method of the treatment of early-stage cancer of the oesophagus. The procedure removes abnormal or diseased tissue from the inner lining and is minimally invasive; organ function is preserved without surgery.

For larger or more complex lesions, ESD may allow deeper, more precise dissection. It is a technique that enables the removal of tumours in a single piece, thereby enhancing diagnostic accuracy.

At Gleneagles Hospitals, the EMR procedure follows a well-defined clinical approach to optimise patient safety and treatment precision.

Preparation and Sedation

Before the procedure, the patient must fast for several hours so that the stomach and oesophagus are empty. To keep the patient comfortable and still during the procedure, the medical team administers a sedative or general anaesthesia.

Step-by-Step Technique

The process normally lasts 30-90 minutes.

• Insertion: The physician inserts the endoscope into the mouth and oesophagus. A high-definition camera allows the professional to study the lining in greater detail.
• Marking and Lifting: The doctor identifies the boundaries of the abnormal tissue. They then inject fluid into the submucosal layer with saline solution or specialised dye. This elevates the lesion, making it easier to separate from healthy tissue.
• Resection: With the help of a wire loop (snare) or suction cap, the doctor grips the raised tissue and uses a mild electrical current to cut it away. This process also cauterises the area to prevent bleeding.
• Tissue Retrieval: The tissue is then removed carefully using an endoscope and sent to a pathology laboratory for analysis.

Endoscopic Mucosal Resection has several significant advantages over traditional surgical operations:

• Organ Preservation: This technique enables the patient to maintain normal oesophageal function without undergoing an extensive resection, making it easier to swallow and eat as soon as the patient has healed.
• Limited Recovery Time: Most patients return to their normal lives within a couple of days.
• Reduced Risk: The risk of infection and cardiovascular complications is significantly reduced compared with open-chest or abdominal surgery.
• Accurate Staging: Since the entire lesion will be excised, pathologists will be able to provide a precise evaluation of the cancer stage.

Although EMR is considered a highly safe treatment, specialists discuss potential risks with every patient.

• Bleeding: The most common adverse effect is mild bleeding at the resection site.  Surgeons can usually manage this immediately during the procedure using the endoscope.
• Narrowing (Stricture): When a large section of the oesophageal lining is removed, scar tissue may grow, causing the oesophagus to narrow. This can be treated later with endoscopic dilation if necessary.
• Perforation: The risk of oesophageal wall tear is quite minimal. When this occurs, it is often corrected as quickly as possible with endoscopic clips.

Gleneagles Hospitals is a special oesophageal centre offering a specialised setting with:

• Expert Interventional Endoscopists: Experts who are highly experienced in high-precision EMR techniques.
• High Resolution Imaging: High definition imaging to detect even slight mucosal variation.
• Multidisciplinary Coordination: Comprehensive treatment with oncologists and pathologists.
• Dedicated Support: Experienced nursing and dietitian staff to help you towards recovery.