<P> Fecal occult blood testing ( FOBT ) , as its name implies , aims to detect subtle blood loss in the gastrointestinal tract , anywhere from the mouth to the colon . Positive tests ( `` positive stool '' ) may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy ( such as colorectal cancer or gastric cancer ) . The test does not directly detect colon cancer but is often used in clinical screening for that disease , but it can also be used to look for active occult blood loss in anemia or when there are gastrointestinal symptoms . </P>
<P> Fecal occult blood testing ( FOBT ) , as its name implies , aims to detect subtle blood loss in the gastrointestinal tract , anywhere from the mouth to the colon . Positive tests ( `` positive stool '' ) may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy ( such as colorectal cancer or gastric cancer ) . The test does not directly detect colon cancer but is often used in clinical screening for that disease , but it can also be used to look for active occult blood loss in anemia or when there are gastrointestinal symptoms . </P>
what is a positive stool exam for occult blood significant for
what is a positive stool exam for occult blood significant for
may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding
may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding