“I Nearly Put It Off Again” – A Patient’s Story
James, 54, felt well overall. Apart from occasional bloating and a change in bowel habit, nothing seemed alarming. He assumed it was stress or diet and delayed seeing his GP. When routine blood tests later showed iron deficiency anaemia, his doctor referred him for a colonoscopy.
The test identified a precancerous polyp, removed during the same procedure. James required no further treatment, only follow-up surveillance. “I didn’t realise how important timing was,” he said afterwards. “That test may have prevented something far more serious.”
What Is a Colonoscopy?
A colonoscopy is a gold-standard investigation that allows direct visual assessment of the entire large intestine, from the rectum to the caecum. A flexible endoscope equipped with a high-definition camera is used to identify abnormalities such as:
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Polyps
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Inflammation
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Bleeding sources
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Early or established bowel cancer
Importantly, colonoscopy is not only diagnostic. It is also therapeutic, allowing removal of polyps and biopsy of suspicious areas during the same procedure.
Why the Timing of a Colonoscopy Is So Important
Bowel cancer typically develops slowly, often over 10–15 years, progressing from benign polyps to malignancy. Colonoscopy interrupts this process by detecting and removing precancerous lesions before cancer develops. This is why when you have a colonoscopy is just as important as having one at all.
Delayed investigation can mean missed opportunities for early, curative intervention.
Age-Based Screening Recommendations
For individuals at average risk, colonoscopy screening usually begins at age 50 and continues until at least 75, provided overall health and life expectancy justify screening. If no abnormalities are found, repeat colonoscopy is commonly advised every 10 years.
Screening may start earlier, often in the 40s or even younger, if you have:
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A first-degree relative with bowel cancer
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A family history of advanced adenomas
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Certain inherited syndromes
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Long-standing ulcerative colitis or Crohn’s colitis
Your personal risk profile determines both when screening begins and how frequently it is repeated.
Symptoms That Should Trigger an Urgent Colonoscopy
A colonoscopy should not be delayed at any age if concerning bowel symptoms are present. These include:
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Rectal bleeding, especially if persistent or unexplained
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Iron deficiency anaemia, particularly in men and post-menopausal women
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Ongoing diarrhoea, constipation, or alternating bowel habits
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Abdominal pain not explained by simple causes
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Unintentional weight loss
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A positive faecal occult blood or FIT test
While these symptoms do not always indicate cancer, they require proper exclusion of serious pathology.
Surveillance Colonoscopy and High-Risk Groups
Some patients require closer follow-up with colonoscopies at shorter intervals. This includes those with:
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Previously removed high-risk or multiple polyps
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A history of bowel cancer
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Chronic inflammatory bowel disease
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Incomplete or technically difficult prior examinations
Surveillance colonoscopy is a key component of long-term cancer prevention and tailored gastrointestinal care.
What to Expect From the Procedure
Colonoscopy is typically performed under conscious sedation, allowing patients to remain comfortable while responsive. Most procedures last 20–40 minutes. Recovery is rapid, and patients usually return home the same day.
While bowel preparation is often considered the most challenging aspect, it is essential for ensuring accurate and safe examination.
When Should You Speak to a Specialist?
If you are approaching screening age, have risk factors, or are experiencing persistent bowel symptoms, early consultation is advised. Colonoscopy provides clarity, reassurance, and when needed, early intervention that saves lives.
Take Control of Your Bowel Health
Early detection changes outcomes.
Book a consultation with LSDC Healthcare to discuss colonoscopy screening, investigate symptoms, and receive specialist-led, personalised gastrointestinal care