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A 67-year-old woman presented with a three-month history of abdominal pain, weight loss, and rectal bleeding. She had never been screened for colon cancer. Laboratory evaluation revealed a hematocrit of 32 percent and normal liver function. The patient was referred for computed tomography (CT) of the abdomen with integrated CT colonography. This technique combines contrast-enhanced CT scanning of the abdomen and pelvis with rectal air insufflation to distend the colon. A coronal multiplanar reformatted image (Panel A) shows a constricting lesion in the distal transverse colon (white arrow), which has overhanging edges that suggest a malignant lesion. A low-attenuation, peripherally . . . [Full Text of this Article] |
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