Choosing the Right Colorectal Cancer Screening for You

After facing a family history of colorectal cancer, Emma Chen (a pseudonym) discovered the importance of timely screening. Diagnosed with colorectal cancer at 60, her father’s diagnosis prompted Emma to schedule a colonoscopy at the age of 38. However, she postponed it until she was 42, leading to the discovery of a large polyp harboring early invasive cancer during the examination.

Dr. Aaron Poh, a colorectal surgeon and medical director at Alpine Surgical Practice, explains how early detection could have altered the course of her treatment. "An earlier colonoscopy at age 40 could have identified the polyp before it progressed to cancer, potentially allowing for its removal with less invasive measures,” he shares.

Screening Recommendations Based on Risk Factors

While general guidelines suggest starting colorectal screening at age 50 for those at average risk, individuals with a familial predisposition to the disease might need to begin earlier. The urgency is underscored by the rising incidence of colorectal cancer among younger adults, as highlighted by the latest figures from the Singapore Cancer Registry.

Dr. Poh points out that symptoms like blood in the stool, changes in bowel habits, persistent abdominal pain, and unexplained weight loss should prompt immediate medical consultation. "Yet, it’s essential to remember that colorectal cancer can develop without any apparent symptoms, making regular screening vital,” he adds.

Understanding Your Family History

The decision on when and how to screen for colorectal cancer relies heavily on several factors such as age, medical background, and family history. Dr. Poh emphasizes that individuals with a close relative diagnosed with colorectal cancer—especially at a young age—should consider starting screening prior to turning 50.

"We assess the patient’s history of cancer or precancerous conditions and consider lifestyle factors such as smoking, alcohol consumption, and obesity when determining risk,” he explains.

For high-risk individuals, guidelines recommend beginning colonoscopy screenings at 40 or ten years earlier than the youngest diagnosis in the family, whichever occurs first. Inherited conditions like Lynch syndrome and familial adenomatous polyposis significantly escalate cancer risk and should be evaluated by specialists.

Comparing Screening Methods

When it comes to detecting colorectal cancer, three primary screening methods exist, each with distinct benefits and limitations:

• Faecal Immunochemical Test (FIT): This home-based, non-invasive test checks for hidden blood in stool samples. It's recommended annually for adults over 50 without additional risk factors. However, Dr. Poh warns that while a negative result can provide some reassurance, it does not eliminate the possibility of cancer.
• Blood-based Circulating Tumour DNA (ctDNA) Tests: These emerging tests assess DNA fragments associated with tumors in the bloodstream. They are still being examined for routine screening. A positive result necessitates further testing, typically a colonoscopy.
• Colonoscopy: A vital tool for both screening and diagnostic purposes, colonoscopies involve inserting a flexible tube with a camera to inspect the colon and rectum. They allow for the identification and removal of polyps in a single procedure, offering the most comprehensive screening experience.

For individuals at average risk, a colonoscopy is typically suggested every five years after turning 50. Those with an elevated risk might require more frequent evaluations. Dr. Poh assures that while some people may worry about discomfort, colonoscopies are usually performed under sedation, and complications are rare.

For patients uncertain about undergoing a colonoscopy, discussing potential concerns and alternative screening options with a healthcare provider is crucial.

Emphasizing Healthy Lifestyle Choices

While screening remains the most effective way to detect colorectal cancer early, maintaining a healthy lifestyle can also contribute to risk reduction. Regular exercise, balanced nutrition, and avoiding tobacco and excessive alcohol consumption are beneficial habits to integrate into daily life. However, these practices should not substitute necessary screenings.

To learn more about colorectal health screenings and preventive measures, visit Alpine Surgical Practice.