Colorectal Cancer Screening
Saudi guidelines recommend starting screening at age 45 for everyone. Colonoscopy can find and REMOVE polyps before they become cancer — making it the single most effective cancer prevention tool we have.
This article is educational and does not replace your doctor's advice. Seek urgent care for any red-flag symptoms.
What is it?
Colorectal cancer (CRC) is one of the most common cancers in Saudi Arabia and globally — but most cases develop slowly from polyps over 7-15 years. Screening means looking for polyps and early cancer in people with no symptoms. Done properly, it dramatically reduces both cancer incidence (by removing pre-cancerous polyps) and cancer death.
How common is it?
CRC is the most common cancer in Saudi men and second most common in Saudi women. About 2,500 new cases per year. Incidence is rising rapidly, especially under age 50.
Why does it happen?
Combination of: aging, low-fiber/high-red-meat diet, obesity, sedentary lifestyle, smoking, family history, genetic syndromes (Lynch, FAP), inflammatory bowel disease.
Symptoms
- Most polyps and EARLY cancers have NO symptoms — that is why screening matters
- Late symptoms: rectal bleeding, change in bowel habits, weight loss, anemia, abdominal pain
Red flags — seek urgent medical care
ANY rectal bleeding (even small)
Investigate at any age — don't assume hemorrhoids.
Change in bowel habits >6 weeks
Need colonoscopy.
Iron-deficiency anemia in adults, especially men or postmenopausal women
Always investigate.
How is it diagnosed?
Colonoscopy is the gold standard — both screens AND treats by removing polyps. FIT (fecal immunochemical test) annually is an alternative; if positive needs colonoscopy. CT colonography every 5 years for those who can't have colonoscopy. Stool DNA test every 3 years is another option.
What the latest science says
Saudi MOH lowered screening age from 50 to 45 in 2023 (mirroring updated international guidelines) due to rising CRC incidence in younger adults. Several centers offer Sehhaty-based FIT screening as a first step.
Outlook — what to expect
CRC found early (Stage I): 5-year survival >90%, often cured by surgery alone. Polyps found and removed: cancer prevented entirely. Late-stage CRC: 5-year survival 14%. Screening is the most effective intervention.
Treatment
Habits & Lifestyle
Lifestyle reduces risk; screening catches what slips through.
- Get screened at 45 — sooner if family history of CRC or polyps.
- Maintain healthy weight.
- Stop smoking.
- Limit alcohol.
- Regular physical activity.
- Aspirin (low-dose) — discuss with your doctor; reduces CRC risk in selected patients.
Diet
Diet matters — Mediterranean pattern is best evidence.
- Plenty of fruits, vegetables, whole grains, legumes — high fiber.
- Limit red meat (especially processed: sausages, bacon, cured meats) — strong CRC link.
- Adequate calcium and vitamin D — modest protective effect.
Medications
Aspirin in selected patients.
- Aspirin 75-100 mg daily reduces CRC risk by ~30% over 10+ years — discuss with your doctor (balance with bleeding risk).
Procedures & Surgery
Colonoscopy every 10 years for average-risk; sooner with polyps or family history.
- Average-risk: colonoscopy every 10 years starting at 45.
- Family history of CRC or advanced polyp in first-degree relative: start at 40 or 10 years before relative's age, every 5 years.
- Genetic syndromes (Lynch, FAP): more frequent surveillance starting in teens or 20s.
- Polyps found: surveillance interval depends on size, number, type — typically 3-5 years.
- Stop screening at 75-85 depending on health.
In the Saudi context
MOH offers free CRC screening through primary care clinics and Sehhaty. Major hospitals provide colonoscopy. Several Saudi awareness campaigns target the 45+ age group. Insurance plans typically cover screening colonoscopy fully.
Questions to ask your doctor
Save this list or print it before your appointment — doctors appreciate prepared patients.
- What's my CRC risk based on family history?
- Should I do colonoscopy or FIT?
- When is my next screening interval?
- Should I take aspirin for CRC prevention?
Medically reviewed by: SGA Patient Education Panel · Last reviewed 24/04/2026