Virtual Colonoscopy Most Cost-Effective for Colon Cancer Screening.

The article discusses research on the effectiveness of virtual colonoscopy, or computed tomography colonography (CTC), in colon cancer screening. It references a study by Doctor Perry Pickhardt and colleagues, published in a 2007 issue of "Cancer." It compares virtual colonoscopy with optical colonoscopy and flexible sigmoidoscopy. It states that lesions <5 millimeter are not clinically relevant in the screening of colorectal cancer.