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DOI:10.2214/AJR.04.1748
AJR 2006; 186:718-728
© American Roentgen Ray Society

Pictorial Essay

Extracolonic Findings Identified in Asymptomatic Adults at Screening CT Colonography

Perry J. Pickhardt1,2 and Andrew J. Taylor1

1 Department of Radiology, University of Wisconsin Medical School, E3/311 Clinical Science Center, 600 Highland Ave., Madison, WI 53792-3252.
2 Department of Radiology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814.

OBJECTIVE. The purpose of this article is to demonstrate the wide variety of extracolonic findings that may be encountered at screening CT colonography (CTC) in asymptomatic adults as well as to discuss the pertinent issues regarding the detection of potential abnormalities in a healthy population.

CONCLUSION. Regardless of whether extracolonic evaluation resulting from CTC screening is viewed as a net benefit or liability, it is an unavoidable responsibility that must be handled with care by the interpreting radiologist. Although many potential abnormalities may be questioned, the pretest probability of clinically relevant disease is quite low in average-risk asymptomatic adults, which may influence subsequent management decisions.

Keywords: abdominal imaging • colonography • CT • CT screening


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