The recommendation for getting a colonoscopy once a year may be a misunderstanding or misinformation. In general, the standard guidelines for colorectal cancer screening, including colonoscopy, are based on evidence and medical research. The recommended frequency for colonoscopy screenings may vary depending on a person's individual risk factors, age, and medical history. However, getting a colonoscopy once a year is not the standard recommendation for the average individual without specific risk factors.
The American Cancer Society (ACS) provides guidelines for colorectal cancer screening, which are based on a person's average risk, family history, and other factors. For average-risk individuals, the ACS currently recommends the following screening options:
- Colonoscopy every 10 years, starting at age 45 to 50.
- Alternatively, a stool-based test (such as fecal immunochemical test or high-sensitivity guaiac-based fecal occult blood test) every year, or a stool DNA test every three years, starting at age 45 to 50.
If a person has certain risk factors, such as a family history of colorectal cancer, a personal history of colorectal polyps or cancer, or certain genetic conditions, their doctor may recommend more frequent screenings or an earlier start to screening.
The reason for these screening guidelines is that colorectal cancer can take many years to develop from precancerous polyps. Regular screenings are essential because they can detect and remove polyps before they become cancerous or identify cancer at an early stage when it is more treatable.
It's crucial for individuals to discuss their personal risk factors and screening options with their healthcare provider to determine the most appropriate screening schedule for their specific situation. Following the recommended guidelines based on evidence and medical expertise can help in the early detection and prevention of colorectal cancer.