Overview

Colonic polyps are growths that occur on the inner lining of the colon, which is the large intestine. They are usually benign (noncancerous) but have the potential to develop into colorectal cancer over time if left untreated. Colonic polyps can vary in size and shape and may be flat or stalk-like. While most polyps are harmless, some can turn cancerous over time.

Let us learn the causes, symptoms, diagnosis, and treatment options for colonic polyps, empowering them to safeguard their colon health and prevent colorectal cancer proactively.

Causes of Colonic Polyps

Although the specific aetiology of colonic polyps is unknown, various risk factors have been discovered. These include age, a family history of polyps or colorectal cancer, a personal history of polyps, inflammatory bowel disease, smoking, obesity, and a diet high in fat and low in fibre.

- Age- With age, the risk of colonic polyps increases, with the majority of cases occurring in women over the age of 50.
- Family history- Women with a family history of colonic polyps or colorectal cancer are at an increased risk of developing polyps. Women with genetic conditions such as familial adenomatous polyposis (FAP) and Lynch syndrome (hereditary nonpolyposis colorectal cancer) are associated with a higher risk of developing polyps.
- Personal history- Women who have had colonic polyps in the past are at an increased risk of developing new polyps in the future.
- Inflammatory bowel disease (IBD)- Ulcerative colitis and Crohn's disease, collectively known as inflammatory bowel disease, are associated with an increased risk of colonic polyps.
- Lifestyle factors- Certain lifestyle choices like a diet high in red and processed meats, low fiber intake, sedentary lifestyle, obesity, smoking, and excessive alcohol consumption may contribute to the development of colonic polyps.
- Hereditary syndromes: Inherited conditions characterised by specific gene mutations such as FAP and Lynch syndrome, significantly increase the risk of developing colonic polyps and colorectal cancer.

While these factors increase the likelihood of developing polyps, it is essential to remember that anyone can develop them, regardless of their risk profile.

Symptoms of Colonic Polyps

In most cases, colonic polyps do not cause noticeable symptoms. However, larger or cancerous polyps may lead to -

- Changes in bowel habits
- Rectal bleeding
- Blood in the stool
- Abdominal pain or cramping
- Anaemia
- Unexplained weight loss, or
- A feeling of incomplete bowel movements

It is critical to see a doctor for additional assessment if any of these symptoms appear.

Diagnosis: Screening and Detection

Regular screening for colonic polyps is a vital component of preventive care. Common screening methods include colonoscopy, flexible sigmoidoscopy, and virtual colonoscopy.

Diagnosing colonic polyps typically involves a combination of screening tests and diagnostic procedures. The main methods used for diagnosing colonic polyps include:

Screening tests

- Faecal occult blood test (FOBT)- This test checks for the presence of hidden blood in the stool, indicating the presence of polyps or other abnormalities.
- Stool DNA test- This test analyses the stool sample for DNA changes that may be associated with the presence of polyps or colorectal cancer.
- Flexible sigmoidoscopy- A flexible tube with a camera on the end is inserted into the rectum and lower part of the colon to visualise any abnormalities. However, flexible sigmoidoscopy can only detect polyps in the lower part of the colon.
- Virtual colonoscopy (CT colonography)- This non-invasive imaging test uses a CT scan to create detailed images of the colon. It can detect polyps and other abnormalities throughout the colon.

Diagnostic procedures

- Colonoscopy - It is the most effective and commonly used procedure to diagnose and evaluate colonic polyps. It involves the insertion of a long, flexible tube with a camera (colonoscope) into the rectum and entire colon to visualise the colon lining. During a colonoscopy, polyps can be detected, and if found, they can be removed or biopsied for further examination.
- Sigmoidoscopy- Similar to flexible sigmoidoscopy used for screening, sigmoidoscopy can also be performed as a diagnostic procedure to examine the rectum and lower part of the colon for polyps.
- Biopsy- During a colonoscopy or sigmoidoscopy, if a polyp is detected, it is usually removed, or a small sample (biopsy) is taken for laboratory analysis. It helps determine if the polyp is benign or potentially cancerous.
- The treatment of colonic polyps primarily involves their removal, as most polyps have the potential to develop into colorectal cancer over time. The specific treatment approach depends on the size, number, location, and characteristics of the polyps.
- Polypectomy- This is the most common method for removing colonic polyps. It is typically performed during a colonoscopy. A small wire loop or snare is passed through the colonoscope, and the polyp is cut from the colon's lining using an electric current. The removed polyp is then sent for further examination (histopathology) to determine its nature, whether it is benign, precancerous, or cancerous.
- Endoscopic mucosal resection (EMR)- EMR may be used for larger polyps that simple polypectomy cannot remove. It involves injecting a solution beneath the polyp to lift it from the colon wall and then using specialised instruments to remove the polyp.
- Surgery- In some instances, surgical intervention may be required when polyps are huge, located in a challenging area of the colon, or there is suspicion of cancer. It typically involves removing a portion of the colon through open surgery or minimally invasive laparoscopic techniques.

Ensuring Better Colon Health

Preventing colonic polyps and reducing the risk of colorectal cancer involves adopting healthy lifestyle habits. Here are some tips to promote colon health:

- Eat a balanced diet rich in fruits, vegetables, whole grains, and fibre while limiting the consumption of processed foods and red meats.
- Maintain a healthy weight and engage in regular physical activity.
- Quit smoking and limit alcohol consumption.
- Stay hydrated and ensure an adequate intake of fluids.
- Follow recommended screening guidelines and undergo regular screenings as advised by healthcare professionals.
- Be aware of your family history and inform your healthcare provider if you have a family history of colorectal polyps or cancer.

When to Consult a Doctor

You can also get in touch with the expert Gastroenterology doctors at Narayana Healthcare based in your city to get immediate attention and medical support during injuries, health disorders or any other health concern.

Conclusion

Colonic polyps serve as an important reminder of the significance of colon health and the prevention of colorectal cancer. Individuals can take proactive steps towards early detection and effective treatment by understanding the causes, recognising the symptoms, and undergoing regular screenings. By embracing a healthy lifestyle and adhering to preventive measures, we can prioritise colon health, reduce the risk of colonic polyps, and promote overall well-being. Remember, prevention is key, and your colon health matters.

FAQs

Q. Are colonic polyps serious? A. Colonic polyps can vary in seriousness. While most polyps are benign and do not affect the body right away, some polyp types can turn into colorectal cancer over time. Therefore, it is vital to monitor and manage colonic polyps appropriately.

Q. What is the leading cause of colonic polyps? A. The exact cause of colonic polyps is not known. However, a number of elements are thought to have a role in their growth. These include smoking, certain diseases such as inflammatory bowel disease (IBD), genetic mutations, family history of polyps or colon cancer, advanced age, a diet heavy in fat and poor in fibre, and older age.

Q. What is the treatment for colonic polyps? A. The treatment for colonic polyps depends on their size, number, and characteristics. Small polyps may be removed during a colonoscopy using techniques such as snaring or cautery. Larger polyps require more complex surgical procedures, including endoscopic mucosal resection (EMR) or surgical removal. The removed polyps are sent for laboratory analysis.

Q. Are colonic polyps curable? A. Colonic polyps can be effectively managed and, in many cases, completely removed. Early polyp detection and removal can significantly lower the risk of colorectal cancer. However, the potential for new polyps to develop in the future remains. Regular surveillance and follow-up colonoscopies are typically recommended to monitor for recurrence or new polyps. Early polyp detection and removal can significantly lower the risk of colorectal cancer.

Reference Links:

- https://www.ncbi.nlm.nih.gov/books/NBK430761/
- https://www.asge.org/home/for-patients/patient-information/understanding-polyps
- https://www.cancercenter.com/cancer-types/colorectal-cancer/risk-factors/colon-polyps
- https://emedicine.medscape.com/article/172674-overview