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Screening of colorectal cancer: progress and problems
1Memorial Sloan-Kettering Cancer Center, 1275 York Ave., New York, NY 10021, USA.
Summary
Colorectal cancer screening, recommended for individuals 50 and older, offers early detection and prevention opportunities. Despite proven effectiveness and cost-efficiency, low screening rates and implementation barriers hinder widespread adoption and impact.
Area of Science:
- Oncology
- Gastroenterology
- Preventive Medicine
- Public Health
Background:
- Colorectal cancer (CRC) has a long natural history, often evolving from adenomatous polyps, presenting opportunities for early detection and prevention.
- Significant advancements in understanding CRC biology and prevention have been achieved over the past three decades.
- Evidence-based guidelines recommend CRC screening for individuals aged 50 and older, and younger if risk factors are present.
Purpose of the Study:
- To review the current state of colorectal cancer screening, including its effectiveness, available methods, and challenges.
- To highlight the importance of overcoming barriers to increase screening rates for improved public health outcomes.
- To emphasize the cost-effectiveness and life-saving potential of widespread colorectal cancer screening implementation.
Main Methods:
- Review of evidence-based guidelines and scientific literature on colorectal cancer screening.
- Discussion of various screening modalities, including established methods and emerging technologies like stool DNA testing and virtual colonoscopy.
- Analysis of challenges in screening implementation, such as low uptake, patient and system barriers, resource limitations, and quality control issues.
Main Results:
- Colorectal cancer screening is highly effective in detecting early-stage cancer and preventing its development through adenoma removal.
- A global consensus supports offering screening to individuals aged 50 and above, with earlier screening for high-risk groups.
- Emerging technologies show promise, but significant challenges including low screening rates, resource constraints, and quality control persist.
Conclusions:
- Colorectal cancer screening is a cost-effective strategy with the potential to save numerous lives annually.
- Addressing patient and system barriers, optimizing resource allocation, and ensuring quality control are crucial for successful implementation.
- Risk stratification, two-stage screening, and adjusted surveillance protocols may enhance screening efficiency and effectiveness.