Extracolonic and Incidental Findings on CT Colonography (Virtual Colonoscopy)
Mikael Hellström1,
Maria H. Svensson1 and
Anders Lasson2,3
1 Department of Radiology, Sahlgrenska University Hospital, The Sahlgrenska
Academy at Göteborg University, Göteborg 413 45, Sweden.
2 Department of Medicine, Sahlgrenska University Hospital, The Sahlgrenska
Academy at Göteborg University, Göteborg 413 45, Sweden.
3 Department of Medicine, Borås Hospital, Borås 501 82,
Sweden.
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Fig. 1A. —75-year-old man with previously unknown hiatal hernia and
gallstones. Unenhanced CT colonograms show 5.5 x 4.5 cm hiatal hernia
(A) and multiple stones measuring 2–6 mm in gallbladder
(B), findings classified as moderately important.
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Fig. 1B. —75-year-old man with previously unknown hiatal hernia and
gallstones. Unenhanced CT colonograms show 5.5 x 4.5 cm hiatal hernia
(A) and multiple stones measuring 2–6 mm in gallbladder
(B), findings classified as moderately important.
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Fig. 2. —75-year-old man with previously unknown abdominal aortic
aneurysm. Unenhanced CT colonogram shows abdominal aortic aneurysm of 63 mm in
diameter, classified as major finding. Patient underwent successful elective
surgery.
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Fig. 3. —78-year-old woman with previously unknown pancreatic mass.
Unenhanced CT colonogram shows solid-appearing pancreatic mass measuring 48
x 41 mm, classified as major finding. Several solid-appearing hepatic
masses were also present. Pancreatic cancer and hepatic metastases were
confirmed at subsequent contrast-enhanced CT and biopsy. Treatment was
palliative.
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Fig. 4. —70-year-old man with previously unknown adrenal mass.
Unenhanced CT colonogram shows 19 x 17 mm right adrenal mass of low
attenuation that was classified as moderately important. Density of lesion was
–1 to –11 H, suggesting benign cause.
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Fig. 5. —59-year-old man with previously unknown renal mass.
Unenhanced CT colonogram shows slightly hyperdense 12-mm renal parenchymal
mass in upper anterior portion of right kidney. Mass had density of
47–54 H, suggesting possibility of solid lesion or hemorrhagic cyst, and
was classified as major finding. Follow-up with sonography failed to show
lesion, but contrast-enhanced CT 4 months and 9 months later confirmed solid
nature of lesion, which showed slight increase of density after IV
administration of contrast medium. MRI of kidneys 21 months after CT
colonography showed lesion size to be unchanged.
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Copyright © 2004 by the American Roentgen Ray Society.
