Screening for Colorectal Cancer with a Colonoscopy: A Family Doctor’s Role in Early Detection.

May 4, 2025

Colorectal cancer is the second leading cause of cancer-related deaths in Canada, but it is also one of the most preventable forms of cancer. In Alberta, regular screening is strongly encouraged, especially for individuals over the age of 50. Although colonoscopies are performed by specialists, family doctors like Dr. Helen Dion in Calgary are essential in recognizing risk factors, initiating preliminary testing, referring to specialists, and supporting patients through the follow-up process.

Why Is Colorectal Cancer Screening Important?

Colorectal cancer usually develops from precancerous polyps in the colon or rectum. These polyps can be detected and removed before they become cancerous. Early detection saves lives—screening can reduce deaths by as much as 90% when cancer is identified in its early stages.

Who Should Be Screened in Alberta?

In Alberta, colorectal cancer screening is recommended every one to two years for people aged 50 to 74. For individuals with a family history of colorectal cancer, or with inflammatory bowel diseases, earlier screening may be advised. Dr. Dion can help assess your personal risk and determine whether earlier screening is appropriate.

Symptoms That May Indicate a Need for Screening

  • Changes in bowel habits lasting more than a few weeks
  • Rectal bleeding or blood in the stool
  • Unexplained fatigue or iron-deficiency anemia
  • Sudden and unintended weight loss
  • Persistent abdominal cramps or discomfort

Dr. Helen Dion’s Role as Your Family Doctor

As a family doctor in Calgary, Dr. Dion does not perform colonoscopies herself, but she plays a critical role in the screening process. She can educate patients about colorectal cancer, order initial tests such as the FIT (Fecal Immunochemical Test), interpret results, and provide referrals to Alberta-based specialists for further diagnostics. After your colonoscopy, she remains involved to review reports and help manage ongoing care if needed.

What Happens During a Colonoscopy?

A colonoscopy is a procedure where a gastroenterologist uses a flexible tube with a small camera (colonoscope) to examine the colon and rectum. It helps detect polyps, lesions, or signs of cancer. The procedure is typically done in a hospital or outpatient endoscopy clinic.

  • You will receive sedation or anesthesia for comfort.
  • You will lie on your left side with knees pulled to your chest.
  • The specialist inserts the colonoscope through the rectum to examine the colon lining.
  • Tissue samples or polyps may be removed during the exam.
  • Mild cramping or bloating may occur afterward.

How to Prepare for a Colonoscopy

Before the procedure, you will have a consultation with a nurse or physician. Preparation includes:

  • Diet: A low-fiber or liquid diet is required 1–2 days before.
  • Medications: Inform your doctor about all medications.
  • Bowel Prep: A laxative solution is used to clean the colon.
  • Fasting: You may need to avoid food or drink for several hours before the procedure.

After the procedure:

  • Rest: Plan to rest for the remainder of the day.
  • Transportation: Someone must drive you home due to the effects of sedation.
  • Follow-up: Your doctor will discuss results and recommend next steps if needed.

Book Your Preventive Screening Today

Colorectal cancer is treatable when caught early. If you’re over 50 or have symptoms or risk factors, don’t wait. Dr. Helen Dion is currently accepting patients in Calgary and can guide you through the screening and referral process. To schedule a consultation, please visit the booking page on this website.

References

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