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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.
