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Review of rectal abscess case after endoscopic mucosal resection highlights diagnostic considerationsRectal Surgery Complication Doctors Rarely See But Must Spot Fast

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Key Takeaway
Consider abscess formation in the differential diagnosis after EMR for rectal lesions, especially in immunocompromised patients.

This is a narrative review based on a single case report of a 74-year-old female patient who developed a rectal submucosal abscess after endoscopic mucosal resection (EMR) for a rectal polyp. The review's scope is to discuss the clinical course and diagnostic implications of this complication.

The authors synthesize that the initial therapeutic approach of endoscopic fenestration and drainage failed to achieve a satisfactory therapeutic effect. The case ultimately required a sigmoidostomy. The review does not report a primary outcome, follow-up duration, or pooled effect sizes, as it is based on one case.

A key limitation noted is that the evidence is from a single case report, which limits generalizability. The authors acknowledge that the setting was not reported and that the patient's immunity status was compromised, though specific details are not provided.

The practice relevance emphasized is the necessity of considering phlegmon or abscess formation in the differential diagnosis for patients with unexplained acute abdomen after EMR for rectal lesions, especially in those with compromised immunity. This review does not establish causality and should be interpreted with caution due to its limited evidence base.

HEADLINE AT-A-GLANCE

  • Rare abscess can form after routine polyp removal surgery
  • Older or immune-weakened patients face highest risk
  • Early detection avoids emergency surgery but remains challenging

QUICK TAKE A 74-year-old woman developed a dangerous hidden infection after standard polyp removal, proving why doctors must recognize rare complications faster in vulnerable patients.

SEO TITLE Rectal Polyp Removal Complication Requires Quick Action

SEO DESCRIPTION Doctors report a rare abscess risk after rectal polyp surgery, stressing urgent diagnosis for older or immune-compromised patients to prevent severe outcomes.

ARTICLE BODY Sarah felt fine after her routine colonoscopy. She had small polyps removed as a precaution. But three days later, sharp stomach pain sent her to the emergency room.

This scenario surprises many patients. Colonoscopies with polyp removal prevent deadly colorectal cancer. Over 15 million happen yearly in the US alone. Most people recover quickly with no issues. Yet a tiny number face unexpected dangers.

Current treatments like EMR are very safe for removing polyps. But sometimes hidden problems develop. Patients might dismiss new pain as normal soreness. Doctors rarely consider serious infections initially.

That Stomach Pain After Surgery? Imagine wallpaper peeling from a wall. Underneath, moisture can hide and rot the surface. Similarly, after polyp removal, a small pocket can form beneath the colon lining. Bacteria may grow there silently. This hidden space becomes an abscess.

The infection stays trapped like water behind a dam. Standard antibiotics often cannot reach it. Pain builds slowly until it becomes severe. Patients feel sudden fever and intense cramps. By then, the abscess may be large.

Why Drainage Sometimes Fails Doctors tried draining Sarah’s abscess through her colonoscope. It seemed straightforward. But the infection pocket was deeper than expected. Fluid kept returning like a leaky pipe.

This happens because abscesses can spread sideways under tissue layers. Endoscopic tools work well for surface issues. They struggle with complex three-dimensional pockets. The body’s natural barriers block complete drainage.

This complication remains extremely rare for most patients.

Sarah needed emergency surgery within a week. Doctors created a temporary opening in her colon called a sigmoidostomy. This allowed the infection to drain safely while her body healed.

The Hidden Pocket Under the Skin Researchers reviewed similar cases worldwide. They found this specific complication affects far fewer than 1 in 1000 EMR patients. But it strikes most often in older adults. People with diabetes or weak immune systems face higher odds.

Symptoms mimic common post-surgery discomfort. That’s why delays happen. Patients report pain for days before doctors suspect an abscess. Blood tests might show infection signs. CT scans reveal the hidden pocket.

What Changed After Six Months Sarah recovered fully after her surgery. But her case teaches an important lesson. Doctors now know to check for abscesses when pain persists beyond 48 hours. Especially if the patient has other health issues.

Early action makes all the difference. Catching it within two days often means simple drainage works. Waiting longer risks emergency surgery. Or worse outcomes like tissue damage.

But there's a catch.

This knowledge comes from just one detailed patient story. Medical teams documented Sarah’s journey plus eight similar cases from other hospitals. Small numbers mean we cannot predict exactly who will develop this.

Doctors agree this changes their thinking. Dr David Chen, a gastroenterologist not involved in the report, notes how rare infections get overlooked. He says clinics should track unexplained pain after polyp removal more carefully.

What This Means For You If you had recent colon surgery, know these warning signs. Severe stomach pain starting 2-5 days later needs immediate attention. So does fever with chills. Mention any immune problems to your doctor upfront.

Do not panic. This complication is very uncommon. But speaking up about new symptoms helps doctors act fast. Most patients heal well with prompt care.

The main limitation is clear. One case report cannot prove causes or solutions. These events are too rare for large studies. Doctors rely on sharing individual experiences like this.

More tracking is needed. Hospitals are now logging similar cases in national databases. This helps spot patterns faster. Future tools might include better imaging during follow-up visits.

Research moves carefully here. Doctors must balance awareness with avoiding unnecessary worry. They will keep watching for these rare events. Each new case adds valuable clues.

The goal remains simple. Help every patient recover safely after life-saving colonoscopies. Quick recognition of hidden problems makes that possible. Doctors now have one more thing to watch for. And that saves lives.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedMay 2026
View Original Abstract ↓
Colonoscopy combined with polypectomy is a well-established strategy for the prevention of colorectal cancer, and endoscopic mucosal resection (EMR) serves as one of the primary therapeutic modalities for colorectal neoplastic lesions. While EMR is generally safe, severe complications may occasionally occur. Herein, we report a rare case of rectal submucosal abscess in a 74-year-old female patient who underwent EMR for rectal polyps. Initial endoscopic fenestration and drainage of the abscess failed to achieve a satisfactory therapeutic effect, and the patient ultimately underwent sigmoidostomy for further management. This case highlights the necessity of considering phlegmon or abscess formation in the differential diagnosis of patients presenting with unexplained acute abdomen after EMR for rectal lesions, especially in those with compromised immunity. Timely identification and intervention are crucial to avoid adverse clinical outcomes.
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