Comparison of virtual colonoscopy and colonoecopy in diagnosis of colorectal neoplasia

The diagnostic value of virtual colconoscopy versus colonoscopy was compared in detection of colorectal neoplasia.Virtual colonoscopy was performed on29 patients with suspected colorectal diseases.Results were compared with colonoscopy for each case.Virtual colonoscopy was successfully performed on each patient.All patients tolerated virtual colonoscopy well,had no complications.All colorectal maligrance were identified both by virtual coloncscopy.Twenty-five polyps were detected with colonoscopy,wherease only 16 polyps were difined by virtual colonoscopy,Detection rates of polyps greater than 1.0cm,between 0.5-0.9cm and less than 0.5cm in size were 90%,62.5% and 28.6% respectively.Virtual colonoscopy is fast ,minimally invasive and well tolerated.This technique is a valuable dinical method in diagnosis of colorectal maligance and polyps larger than 0.5 cm in size.