Individuals with high fecal hemoglobin concentrations detected by fecal immunochemical testing (FIT) but negative findings on high-quality colonoscopy represent a clinically challenging population. Although colonoscopy is considered the gold standard diagnostic procedure, previous studies suggest that these individuals may still have an elevated long-term risk of colorectal cancer. This randomized controlled trial aims to determine the optimal surveillance strategy for this high-risk group by comparing two approaches: repeat FIT testing after two years versus direct colonoscopy after two years.
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Detection rate of advanced colorectal neoplasia (ACN)
Timeframe: 2 years