The stool DNA test is a noninvasive laboratory test that identifies DNA changes in the cells of a stool sample. The stool DNA test is a new method to screen for colon cancer.
The stool DNA test looks for abnormal DNA associated with colon cancer or colon polyps. The test also detects hidden blood in the stool, which can indicate the presence of cancer.
If a stool DNA test detects abnormal DNA, additional testing may be used to investigate the cause, such as a colonoscopy to examine the inside of the colon.
One stool DNA test (Cologuard) is approved for colon cancer screening in the United States.