This test evaluates
the lower one third of the large intestine,
or colon. It has been used for years as a
test for colon cancer and polyp screening,
but has become less important since many studies
have shown that many people grow polyps further
up the colon. Still, it can be a valuable test
when done properly. It is usually done without
any medication and generally lasts 3-5 minutes.
There can be some mild cramping during the test,
but it is generally well tolerated due to its
short overall procedural time. For colon cancer
screening, this test should be done in conjunction
with a simple test to check your stool for hidden blood.