结肠癌是胃肠道中常见的恶性肿瘤,做到早诊断、早治疗对改善结肠癌患者预后显得尤其重要。在结肠癌诊断中应用CT,不受结肠管腔形态、大小的限制,且减少患者的痛苦,还能够明确肿瘤的侵犯程度,周围组织受累情况以及转移情况等。本文简要总结结肠癌的CT表现、结肠癌的分期诊断以及结肠癌的CT诊断优势。 Colon cancer is a common malignant tumor in the gastrointestinal tract. Early diagnosis and early treatment are particularly important to improve the prognosis of patients with colon cancer. The application of CT in the diagnosis of colon cancer, regardless of the shape and size of the colon lumen, and reduce the suffering of patients, but also to determine the extent of tumor invasion, the surrounding tissue involvement and metastasis and so on. This article briefly summarizes CT findings of colon cancer, staging diagnosis of colon cancer, and CT diagnosis of colon cancer.