钡剂灌肠显示结肠有一明显肿块，与高亮区形成鲜明对比。此病例表现为苹果核样病变，是由于浸润型结肠癌浸润肠壁四周，使管腔狭窄甚至闭塞。
The barium enema technique instills the radiopaque barium sulfate into the colon, producing a contrast with the wall of the colon that highlights any masses present. In this case, the classic "apple core" lesion is present, representing an encircling adenocarcinoma that constricts the lumen.
