AGA Clinical Practice Update on Current Role of Blood Tests for Colorectal Cancer Screening: Commentary

Area of Science:

• Oncology
• Gastroenterology
• Diagnostic Technology

Background:

• Colorectal cancer (CRC) remains a significant cause of morbidity and mortality in the US.
• Suboptimal adherence to CRC screening and existing disparities highlight the need for improved strategies.
• Advances in diagnostic technology have led to the development of blood tests for CRC screening.

Purpose of the Study:

• To review current evidence on blood tests for CRC screening.
• To assess the potential implications of blood tests for CRC screening programs.
• To determine the performance characteristics, interval, and uptake needed for blood tests to match current screening effectiveness.

Main Methods:

• Leveraged published modeling studies to evaluate test performance.
• Analyzed data on optimal test characteristics, screening intervals, and patient uptake.
• Compared potential effectiveness of blood tests against stool tests and screening colonoscopy.

Main Results:

• Modeling studies were used to assess the effectiveness of blood tests.
• Optimal performance characteristics, screening intervals, and uptake were identified.
• The potential for blood tests to achieve effectiveness comparable to existing methods was explored.

Conclusions:

• Blood tests represent a promising advancement in CRC screening technology.
• Further research and validation are needed to optimize their implementation.
• These tests may help address disparities and improve CRC screening adherence.