New study shows that blood-based tests for colon cancer are not as effective as colonoscopies
A study led by Stanford Medicine has found that blood tests can be a useful screening option for colorectal cancer for patients who might otherwise not undergo screening. However, these blood tests are not as effective as traditional screening methods like colonoscopies or stool-based tests.
Colonoscopy remains the gold standard for detecting colorectal cancer because it allows direct visualization of the colon and removal of precancerous polyps. Stool tests, such as fecal immunochemical tests (FIT) or stool DNA tests, are also proven to be effective non-invasive screening methods. Blood tests, while more convenient, tend to have lower sensitivity and may miss more cases compared to these established methods.
The researchers suggest that blood tests could play an important role in increasing screening rates among individuals who avoid more invasive or inconvenient methods. This could help identify cases of colorectal cancer earlier, when treatment is more effective. The findings highlight the need for continued patient education about the most effective screening options and the potential role of blood tests as a secondary alternative for those unwilling or unable to undergo standard screenings.
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