EMR

Endoscopic Mucosal Resection (EMR) is a minimally invasive advanced endoscopic procedure used to remove abnormal tissue, precancerous lesions, and selected early-stage cancers from the lining of the gastrointestinal tract. It allows a specialist to remove targeted lesions through an endoscope, avoiding the need for conventional surgical incisions in appropriately selected patients.

EMR is commonly performed for lesions in the oesophagus, stomach, colon, and rectum. It can provide both treatment and an important tissue specimen for detailed pathological examination. The pathology report helps determine whether the lesion has been completely removed and whether any further treatment or surveillance is required.

Our EMR service provides advanced endoscopic evaluation and removal of selected gastrointestinal lesions, with careful assessment before treatment and appropriate follow-up afterward.

What Is Endoscopic Mucosal Resection?

EMR is an advanced endoscopic technique designed to remove abnormal tissue that is located within or involves the superficial layers of the gastrointestinal tract.

During the procedure, a flexible endoscope is used to identify the lesion. The specialist then lifts the abnormal tissue away from deeper layers, often by injecting fluid beneath it. This creates a safety cushion between the lesion and deeper structures.

The raised lesion can then be removed using a specialized endoscopic snare. Depending on the size, shape, and location of the lesion, EMR may be performed in one piece or in multiple sections.

The removed tissue is sent to a pathology laboratory for detailed examination.

Why Is EMR Performed?

EMR may be recommended when a gastrointestinal lesion has features suggesting that it is precancerous, early cancerous, or otherwise suitable for endoscopic removal.

Common indications include:

• Large or complex colon polyps
• Precancerous gastrointestinal lesions
• Selected early oesophageal cancers
• Barrett’s oesophagus with dysplasia or early neoplasia
• Selected early gastric cancers
• Large superficial stomach lesions
• Selected rectal lesions
• Other carefully evaluated superficial gastrointestinal abnormalities

The suitability of EMR depends on the lesion’s size, shape, depth, location, surface characteristics, and suspected pathology.

EMR for Colon Polyps

Colon polyps are growths that develop on the inner lining of the large intestine. Although many polyps are benign, some can gradually develop into colorectal cancer.

Removing precancerous polyps is an important part of colorectal cancer prevention.

Small polyps can often be removed using standard polypectomy techniques. Larger or more complex superficial lesions may require advanced techniques such as EMR.

During EMR, the specialist carefully defines the margins of the lesion and injects fluid beneath it when appropriate. The lesion is then removed using an endoscopic snare.

Large lesions may need to be removed in several pieces. The resected tissue is sent for pathological examination to assess the type of lesion, degree of dysplasia, depth of invasion, and other important features.

EMR for Oesophageal Lesions

EMR can also be used to remove selected abnormal areas in the oesophagus.

It has an important role in the management of certain patients with Barrett’s oesophagus, particularly when dysplasia or early neoplastic changes are identified.

Removing visible abnormal areas can provide both treatment and tissue for accurate pathological assessment.

Depending on the patient’s condition, EMR may be combined with other endoscopic therapies, such as ablation, to treat remaining abnormal Barrett’s tissue.

EMR for Gastric Lesions

Selected early gastric cancers and precancerous gastric lesions may be suitable for endoscopic removal.

Careful assessment is essential because the depth of tumour invasion and other pathological features determine whether endoscopic treatment is appropriate.

High-quality endoscopic examination, advanced imaging techniques, and sometimes EUS or other investigations may be used to assess the lesion before treatment.

If a lesion meets appropriate criteria, EMR can remove the abnormal tissue while preserving the stomach and avoiding conventional surgery.

How Is EMR Performed?

EMR is performed using a flexible endoscope in a specialized endoscopy unit.

Before the procedure, your specialist will review your medical history, previous endoscopy reports, imaging, medications, allergies, and relevant blood tests.

For upper gastrointestinal EMR, fasting is generally required. For colorectal EMR, bowel preparation is usually necessary to ensure that the colon can be examined clearly.

During the procedure, the lesion is carefully identified and assessed. Specialized endoscopic imaging may be used to examine the surface and determine the lesion’s margins.

Fluid may be injected beneath the lesion to lift it away from deeper tissue layers. A snare is then positioned around the raised lesion and used to remove it.

The resected tissue is collected and sent to the pathology laboratory.

In selected cases, endoscopic clips or other techniques may be used to reduce the risk of bleeding or close the resection site.

Benefits of EMR

For appropriately selected lesions, EMR offers several important potential benefits:

• Minimally invasive treatment
• No external surgical incision
• Removal of selected precancerous or early cancerous lesions
• Preservation of the surrounding organ
• Tissue available for detailed pathological examination
• Potentially faster recovery than conventional surgery
• Ability to perform treatment during an endoscopic procedure

The most appropriate treatment depends on the individual lesion and the patient’s overall health.

EMR Versus Conventional Surgery

One of the major advantages of EMR is that it can remove selected superficial lesions without requiring major surgery.

Conventional surgery may involve removal of part of an organ or a larger segment of the gastrointestinal tract. For carefully selected early or superficial lesions, endoscopic removal may provide an effective alternative.

However, EMR is not suitable when a lesion has invaded deeply into the gastrointestinal wall, has high-risk features, or cannot be completely removed endoscopically.

In some cases, Endoscopic Submucosal Dissection (ESD) may be preferred when an en-bloc resection of a larger or more complex lesion is required.

Risks and Possible Complications

EMR is generally considered minimally invasive, but complications can occur.

Potential risks include:

• Bleeding
• Perforation
• Abdominal or chest discomfort
• Infection
• Incomplete removal of the lesion
• Recurrence of residual tissue
• Complications related to sedation or anesthesia

The risk depends on the size and location of the lesion, the technique used, and the patient’s individual medical condition.

If a large lesion is removed, the risk of delayed bleeding may remain for several days after the procedure. Your medical team will provide specific instructions about warning signs and when to seek urgent medical care.

Pathology and Follow-Up

The pathology report is an essential part of EMR treatment. The removed tissue is examined to determine the exact diagnosis and assess features such as dysplasia, cancer type, depth of invasion, margins, and other risk factors.

The results help determine whether the EMR was considered curative or whether additional treatment is necessary.

Some patients require follow-up endoscopy to check the treatment site for healing, residual tissue, or recurrence. The timing of surveillance depends on the original diagnosis, lesion size, completeness of removal, and pathology results.

When to Seek Urgent Medical Attention

After EMR, patients should seek prompt medical attention if they develop significant bleeding, vomiting blood, black stools, severe or worsening abdominal or chest pain, persistent fever, dizziness, fainting, or other concerning symptoms.

Your specialist will provide detailed post-procedure instructions before discharge.

Why Specialist Expertise Matters

EMR requires advanced endoscopic skills and careful assessment of the lesion before and during treatment. Correct identification of the lesion margins and depth is important for achieving complete removal while minimizing complications.

Our EMR service provides advanced endoscopic removal of carefully selected gastrointestinal lesions, including large polyps, precancerous lesions, and selected early cancers.

The goal is to provide effective minimally invasive treatment, obtain accurate pathological information, preserve normal gastrointestinal anatomy whenever possible, and establish an appropriate follow-up plan.

If you have been diagnosed with a large gastrointestinal polyp, Barrett’s oesophagus with abnormal changes, an early gastric lesion, or another superficial gastrointestinal abnormality, specialist evaluation can determine whether Endoscopic Mucosal Resection is an appropriate treatment option for you.