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Rectal Polyps in Singapore: Symptoms, Causes & Treatment

DrGanesh DP 2
Dr Ganesh Ramalingam

Specialist in General Surgery

Condition

Rectal Polyps

Rectal polyps are abnormal growths that develop on the inner lining of the rectum. While many rectal polyps are non-cancerous, some may gradually develop into rectal or colorectal cancer over time if left untreated.

At G&L Surgical, we assess and manage a wide range of gastrointestinal conditions, including rectal polyps, with a focus on early detection and prevention of colorectal cancer.

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Table of Contents

Rectal Polyps

What Are Rectal Polyps?

Rectal polyps are small growths that develop along the inner lining of the rectum, which is the final portion of the large intestine located just before the anus. They are a type of colorectal polyp, but unlike colon polyps which develop higher up in the colon, rectal polyps are specifically found within the rectum.

Rectal polyps can vary in size, shape, and number. Some remain harmless, while others may gradually become pre-cancerous or cancerous over time if left untreated. Because rectal polyps and colon polyps may behave similarly and can occur together, doctors often evaluate the entire colon and rectum during a colonoscopy.

Are Rectal Polyps Cancerous?

Not all rectal polyps are cancerous. However, some types of rectal polyps can gradually turn into cancer over time.

The risk of cancer may depend on factors such as:

  • The size of the polyp
  • The number of polyps present
  • The type of polyp
  • Whether abnormal or precancerous cells are detected

Larger polyps generally carry a higher risk of becoming cancerous. Because it is difficult to determine whether a rectal polyp may become cancerous simply based on symptoms alone, doctors often recommend removing polyps when they are found.

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Rectal Polyps Symptoms

Many patients with rectal polyps may not experience any symptoms, especially when the polyps are small.

However, larger or more advanced rectal polyps may cause symptoms such as:

Because symptoms can overlap with conditions such as haemorrhoids or irritable bowel syndrome, proper medical evaluation is important.

What Causes Rectal Polyps?

Rectal polyps develop when abnormal cell growth occurs in the lining of the rectum. While the exact cause may vary, several factors can increase the risk of developing rectal polyps.

These include:

  • Age above 45–50 years old
  • Family history of colorectal polyps or colorectal cancer
  • Obesity
  • Smoking
  • Excessive alcohol consumption
  • Diets high in processed foods and red meat
  • Low-fibre diets
  • Lack of physical activity
  • Type 2 diabetes
  • Inflammatory bowel disease such as ulcerative colitis or Crohn’s disease
  • Certain inherited genetic syndromes

Patients with a personal or family history of colorectal polyps may require earlier or more regular colonoscopy screening.

How Are Rectal Polyps Diagnosed?

Rectal polyps are commonly diagnosed during investigations of bowel symptoms or through colorectal cancer screening. Diagnostic methods may include:

A colonoscopy is the gold standard investigation for detecting rectal polyps. A flexible camera is inserted into the colon and rectum to identify abnormalities.

If polyps are found during the procedure, they can often be removed at the same time.

A sigmoidoscopy examines the lower part of the colon and rectum. It may be used in selected patients depending on symptoms and clinical assessment.

A CT colonography uses imaging to examine the colon and rectum. However, if polyps are detected, a colonoscopy is usually still required for removal or biopsy.

Tests such as the Faecal Immunochemical Test (FIT) may detect hidden blood in stool, which can sometimes indicate colorectal polyps or colorectal cancer.

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Rectal Polyp Removal in Singapore

Most rectal polyps can be removed during a colonoscopy procedure using specialised instruments passed through the endoscope.

The method of removal depends on:

  • The size of the polyp
  • The location of the polyp
  • The number of polyps present
  • Whether suspicious features are seen

Smaller rectal polyps are often removed during a routine colonoscopy, while larger or more complex polyps may require advanced endoscopic techniques or surgery.

You may learn more on our dedicated rectal polyp removal page.

Why Early Detection of Rectal Polyps Matters

Rectal polyps often develop slowly over many years. In many cases, colorectal cancer begins as a non-cancerous polyp before gradually becoming malignant.

Detecting and removing polyps early may:

  • Prevent colorectal cancer
  • Reduce the need for major surgery later
  • Improve long-term outcomes
  • Allow treatment at an earlier stage

This is why colonoscopy screening remains one of the most effective tools for colorectal cancer prevention.

Concerned About Rectal Polyps or Rectal Bleeding?

If you are experiencing persistent bowel symptoms, rectal bleeding, or have been advised to undergo colorectal screening, early assessment may help detect polyps before they become more serious.

Arrange a consultation with Dr Ganesh Ramalingam at G&L Surgical Clinic to discuss whether a colonoscopy or further evaluation may be appropriate for you.

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Frequently Asked Questions

Yes. Some rectal polyps may gradually become cancerous over time if left untreated. Early detection and removal help reduce this risk.

Many rectal polyps do not cause symptoms. Larger polyps may cause bleeding, bowel habit changes, or a sensation of incomplete bowel emptying.

Yes. Rectal bleeding or blood in the stool can occur with some rectal polyps.

Doctors often recommend removal because some polyps may become cancerous over time.

While removed polyps usually do not return, some patients may develop new polyps later. Follow-up colonoscopy screening may be advised.

No. Haemorrhoids are swollen blood vessels, while rectal polyps are abnormal tissue growths inside the rectum.