Review article: Population screening for colorectal cancer.

Area of Science:

• Oncology
• Gastroenterology
• Public Health

Background:

• Colorectal cancer is a leading cause of cancer death globally.
• Early detection and removal of precancerous adenomas significantly reduce mortality.
• Colorectal cancer screening programs are increasingly being implemented worldwide.

Purpose of the Study:

• To review current colorectal cancer screening modalities.
• To discuss challenges in screening implementation.
• To consider future screening technologies and strategies.

Main Methods:

• Review of existing literature on colorectal cancer screening.
• Evaluation of common screening tests: fecal occult blood testing, flexible sigmoidoscopy, and colonoscopy.
• Discussion of emerging technologies like computed tomographic colonography and molecular stool markers.

Main Results:

• Pilot screening programs have shown reduced colorectal cancer mortality.
• Screening implementation faces barriers: cost, invasiveness, resources, and patient acceptance.
• Minimally invasive screening tools are under development.

Conclusions:

• Effective colorectal cancer screening strategies are crucial for reducing mortality.
• A balance between test efficacy, accessibility, and patient acceptance is needed.
• Ongoing research into new technologies may overcome current screening limitations.