Fecal DNA versus fecal occult blood for colorectal-cancer screening in an average-risk population
View abstract on PubMed
Summary
This summary is machine-generated.A new fecal DNA test detects more colorectal neoplasia than the standard Hemoccult II test. This multitarget DNA analysis offers improved noninvasive screening for colorectal cancer, without sacrificing specificity.
Area Of Science
- Gastroenterology
- Oncology
- Molecular Diagnostics
Background
- Colorectal cancer (CRC) screening aims to reduce mortality, with fecal occult-blood testing (FOBT) being the sole noninvasive method.
- Standard FOBT, like Hemoccult II, exhibits limited sensitivity for detecting precancerous lesions and early-stage cancers.
- There is a need for more sensitive noninvasive screening tools for average-risk individuals aged 50 and older.
Purpose Of The Study
- To compare the diagnostic performance of a novel multitarget fecal DNA panel against the Hemoccult II test.
- To evaluate the efficacy of fecal DNA analysis in detecting colorectal neoplasia in asymptomatic, average-risk individuals.
Main Methods
- A study involving 5486 average-risk individuals aged 50+ who underwent stool DNA analysis, Hemoccult II testing, and colonoscopy.
- A subgroup of 2507 participants was analyzed, focusing on those with advanced neoplasia or randomly selected controls.
- The fecal DNA panel assessed 21 specific mutations indicative of colorectal neoplasia.
Main Results
- The fecal DNA panel detected 51.6% of invasive cancers versus 12.9% for Hemoccult II (P=0.003).
- For invasive cancers plus high-grade dysplasia adenomas, the DNA panel detected 40.8% compared to 14.1% for Hemoccult II (P<0.001).
- Specificity was comparable: 94.4% for the DNA panel and 95.2% for Hemoccult II.
Conclusions
- The multitarget fecal DNA panel demonstrated superior detection rates for significant colorectal neoplasia compared to Hemoccult II.
- The improved detection was achieved without a significant compromise in specificity, suggesting enhanced noninvasive screening potential.
- While not detecting all lesions, the DNA test identified a greater proportion of important colorectal neoplasia.