Whenever I recommend a screening colonoscopy, there are always patients who ask me about CT colonoscopy (i.e. virtual colonoscopy). The bottom-line is that while it holds promise, it cannot be recommended for general, clinical use yet. It is not as sensitive as a conventional colonoscopy, especially for smaller lesions. And if any lesions are seen, a conventional colonoscopy is needed regardless. One point that seems to escape the hype of virtual colonoscopy is that the bowel prep still needs to be performed.

Here are the conclusions of the American Gastroenterological Association (AGA):

“CT colonography is currently not the most accurate or convenient test, but may in the future be included in the mix of colorectal cancer screening options available to patients and physicians,” Dr. Emmet Keeffe, president of the AGA said.

“Many practical issues still need to be addressed, including standardization of test performance, patient preparation and interpretation of test results before CT colonography can be recommended for routine clinical practice.”