Using water-based CT colonography (CTC, or irtual colonoscopy), T1/T2 cancer was diagnosed in 13 of the 38 cases, 20 were staged as T3, and fie as T4;

• 使用水灌肠的CT结肠镜检查（CTC，或现代结肠镜检查）中，T1/T2期肿瘤占38例中的13例，T3期的占20例，T4期5例。