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A 74-year-old man was referred for evaluation after a positive fecal occult-blood test. He had no history of cancer and no family history of colorectal cancer. A colonoscopy was performed with the use of a magnifying videoscope, and an irregularity of the colonic wall at the transverse colon was detected (Panel A). The laterally spreading tumor became clear after a 0.2 percent indigo carmine solution was sprayed in the area (Panel B, arrows). A radiograph obtained after the administration of a double-contrast barium enema showed a flat, radiolucent area (Panel C, arrows). The patient underwent a laparoscopically assisted colectomy, and . . . [Full Text of this Article] |
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