1. “Colorectal cancer mainly affects older men”
False, in part. It is the second most common cancer in women and the third in men: both sexes are affected in a comparable manner. Age, however, remains a major risk factor, with 94% of cases diagnosed after the age of 50, but earlier cases, sometimes linked to genetic forms, also exist.
| Received idea | True or False | Reference article |
|---|---|---|
| Mostly affects older men | False (partially) | Article 1 |
| Without family history, none risk | False | Article 7 |
| Painful drug test | False | Article 2 |
| A polyp is already a cancer | False | Article 3 |
| Rarely heals | False | Article 1 |
| Without symptoms, no need for screening | False | Articles 2 and 8 |
2. “Without family history, I risk nothing”
False. As recalled in the article devoted to genetics, 90% of colorectal cancers occur in people with no identified family history. The absence of family history therefore never exempts you from screening after 50 years.
3. “The screening test is painful or complicated”
Fake. The current immunological test consists of a single stool sample at home, without pain or dietary restrictions, followed by mailing. The confusion often comes with colonoscopy, a much more in-depth examination but reserved for cases of positive test or high risk.
4. “A polyp is already cancer”
False. As detailed in another article in this series, a polyp is a benign growth of the mucosa. Only a specific type, the adenoma, can develop into cancer, and this on average over ten to fifteen years. The vast majority of polyps removed during colonoscopy would never have transformed.
5. “This cancer is rarely cured”
False. Detected at an early stage, colorectal cancer is curable in more than 90% of cases. It is precisely one of the cancers where the prognosis most strongly depends on the early diagnosis, hence the importance of organized screening.
6. “Diet alone protects against colorectal cancer”
False, but not completely unfounded. A diet high in fiber and low in processed meat has been shown to reduce risk, but it never completely eliminates it. Organized screening remains essential, regardless of the eating habits followed.
7. “Colonoscopy is a painful exam”
False. Carried out under sedation or light anesthesia, colonoscopy does not cause pain or unpleasant memories for the vast majority of patients. The preparation which precedes it remains the least comfortable stage, but it is temporary and short-lived.
8. “If I don’t have any symptoms, I don’t need to get tested”
False, and this is undoubtedly the most important misconception to correct. The very principle of organized screening is to detect the disease before the appearance of any symptoms, at a stage where the chances of recovery are highest. Waiting for a symptom means losing the benefit of early diagnosis.
9. “Once treated, you can no longer return to normal life”
False. As detailed in our article on post-cancer, the majority of patients treated at an early stage return to fully satisfactory professional, social and sporting activity, with appropriate support (therapeutic part-time work, stomatherapy if necessary).
10. “Prevention is above all an individual matter”
False, in part. If the levers of prevention (diet, physical activity, alcohol, tobacco, screening) are indeed individual choices, their collective effectiveness also depends on participation in screening organized at the population level: the more national participation progresses, the more the number of avoidable deaths decreases significantly.
⚠️ In summary from a medical point of view
Colorectal cancer remains one of the most preventable and curable cancers when it is treated early, but this requires acting before the appearance of symptoms, via organized screening.
None of the individual prevention measures (diet, physical activity, reduction of alcohol and tobacco) replace screening: they complement each other, they do not replace one another.
In case of doubt about your level of personal risk or the course of action to take, your attending physician remains the reference point of contact.
