Table 1

Results of conventional and virtual colonoscopy in the detection of pathologically confirmed colorectal masses and polyps

Technique Confirmed cancers Confirmed polyps
Conventional colonoscopy39 (1 false positive)19 (4 false negative)1-150
Virtual colonoscopy3822 (3 false negative, 2 false positive)
  • 1-150 Two of the four false negative conventional colonoscopy results were caused by the presence of a distal occlusive carcinoma resulting in failure of the colonoscope to reach the polyp site.