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Extracolonic and Incidental Findings on CT Colonography (Virtual Colonoscopy)

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Randomized trial assesses clinical significance of extracolonic findings in symptomatic patients, suggesting implications for diagnosis.

The study aims to determine the frequency and clinical significance of extracolonic findings in symptomatic patients undergoing CT colonography.
111 symptomatic patients underwent CT colonography before colonoscopy.
Helical CT scans were performed with patients in supine and prone positions after rectal air insufflation.
Findings were classified based on clinical importance, and patient records were reviewed for follow-up.
Major findings were noted in 23% of patients, including lymphadenopathy (n=7) and aortic aneurysm (n=6).
Moderate findings occurred in 52% of patients, such as gallstones (n=16) and indeterminate renal masses (n=9).
CT colonography revealed previously unknown extracolonic disorders in 13% of patients.

Hellström et al. (2004) studied this question.

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