When doctors perform a colonoscopy, they are looking for adenomas. These are small growths that can turn into colorectal cancer if left alone. Most screenings use a standard white-light colonoscopy (WLC). However, new analysis suggests that the effectiveness of this standard method might be lower than we previously thought, especially when it comes to finding smaller growths.
Researchers looked at how often these growths are missed. They found that the sensitivity of white-light colonoscopy for overall adenomas was about 0.54. This means the detection rate was lower than some previous models suggested. For very small growths between 1 and 5 millimeters, the sensitivity was even lower, at 0.49. Larger growths of 10 millimeters or more were caught more often, with a sensitivity of 0.84.
It is important to note that these findings rely on specific mathematical models and assumptions about how different types of colonoscopy compare. Because the data depends on these external assumptions, the results might vary. These findings are particularly relevant for experts calculating the costs and effectiveness of cancer screening programs.
