Diagnostic Vs. Screening Colonoscopy
A colonoscopy is a procedure that uses a flexible, lighted tube (colonoscope) to examine the rectum and colon for tissue abnormalities such as polyps or cancer. Depending on their circumstances, individuals may receive either a screening or diagnostic colonoscopy.
Screening Colonoscopy
Typically, individuals receive screening colonoscopies as a protective measure when no symptoms of colon problems currently exist. They are recommended every ten years for most people over 50, notes the Oncology Channel.
Diagnostic Colonoscopy
Doctors typically perform diagnostic colonoscopies when other symptoms or tests indicate the presence of dangerous colon changes, notes the American Cancer Society. During this procedure, tissue samples of any abnormal area are taken through the interior of the colonoscope.
Virtual Colonoscopy
Doctors may also use a newer technique called a virtual colonoscopy, notes the National Cancer Institute (NCI). During this procedure, computer-controlled X-ray machines gather detailed images of the colon and rectum.
Capsule Endoscopy
Individuals unable to undergo a traditional diagnostic colonoscopy may receive a capsule endoscopy, reports the Oncology Channel. During this procedure, the patient swallows a double-sided video camera that takes images of the colon as it passes through the body.
Considerations
Doctors do not know if screening colonoscopies actually reduce deaths associated with colorectal cancer, notes the NCI.
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