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PubMed · 12621835

[Virtual multislice computed tomographic colonoscopy].

Abstract

Virtual colonoscopy or computed tomographic (CT) colonography is a rapidly evolving technique for imaging the entire colon and detection of colorectal polyps. It uses standard helical computed tomography images of the colon and advanced imaging software to produce reformatted two- and three-dimensional views of the entire colorectum. Multi-detector row helical computed tomography has several technical advantages over single-detector row computed tomographic, including faster imaging times with the acquisition of thinner sections. The improved speed and spatial resolution of multislice computed tomography promises an increase of sensitivity and specificity, especially for the detection of colorectal lesions.

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BibTeXRIS

Thomas Mang, M Prokop, A Maier, G Lechner. 2002. [Virtual multislice computed tomographic colonoscopy].. https://pubmed.ncbi.nlm.nih.gov/12621835/

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Effect of hysterectomy status on polyp detection rates at screening flexible sigmoidoscopy.

BACKGROUND: Flexible sigmoidoscopy with polypectomy reduces the incidence of colorectal cancer by removal of premalignant lesions. Factors that reduce the area examined by flexible sigmoidoscopy may reduce its benefit. The aim of this study was to determine whether hysterectomy affects completion and polyp detection rates at flexible sigmoidoscopy. METHODS: Within the setting of a multicenter, prospective, controlled trial of screening flexible sigmoidoscopy, patient and examination variables were compared by appropriate statistical methods for women between the ages of 55 and 64 years with and without a history of a hysterectomy. RESULTS: One quarter of women participants had undergone a hysterectomy. These women were more likely to have incomplete examinations (risk ratio [RR] of incomplete examination, 1.53; 95% CI [1.4, 1.6]). Flexible sigmoidoscopy was more difficult (p < 0.001), more painful (p < 0.001), and less extensive (46 cm vs. 48 cm insertion on average; p < 0.0001) in women who had undergone a hysterectomy. There was a significant trend toward lower relative detection rates of polyps and adenomas at more proximal sites (rectum, sigmoid colon, and proximal to sigmoid; respectively, p = 0.008, p = 0.009) in this group. CONCLUSIONS: Women who have undergone a hysterectomy have less extensive flexible sigmoidoscopy examinations, which are more difficult and more painful, than women without a hysterectomy. Hysterectomy is associated with a reduction in polyp detection rate in the sigmoid colon. This modality of screening may be less effective in women who have undergone a hysterectomy.

Colonic Polyps↗