直肠内充气CT在直肠癌诊断和临床分期中的意义

The significance of computed tomography with rectal inflation of gas in the diagnosis and clinical staging of rectal tumor

目的探讨直肠内充气CT在直肠癌诊断和临床分期中的意义。方法回顾性分析52例经手术病理证实直肠癌患者的直肠内充气CT表现,评价直肠内充气CT在直肠癌诊断和临床分期中的价值。结果直肠内充气CT患者直肠及乙状结肠充分扩张,包绕直肠周围脂肪密度结构,与相对较高密度的肠壁及极低密度肠腔对比清晰。直肠内充气CT对直肠癌TNM分期总的准确率为84.6%(44/52),T分期的准确率为90.4%(47/52),N分期的准确率为86.5%(45/52),M分期的准确率为98.7%(51/52)。结论直肠内充气CT能够清晰显示直肠癌的大小,形态,浸润深度,淋巴结转移情况,与周围器官关系及远处转移情况,获得清晰的直肠系膜影像学特征。直肠内充气CT与TNM病理分期有较高的一致性,是直肠癌术前诊断与临床分期的重要方法。

Objective To evaluate the significance of computed tomography（CT） with rectal inflation of gas in the diagnosis and clinical staging of rectal tumor. Methods CT with rectal inflation of gas was performed on 52 cases of rectal cancer which were confirmed by surgery pathology were investigated retrospectively. Results The overall accuracy rate of rectal cancer TNM staging was 84.6 （44/52）. The accuracy Of T, N and M was 90.4% （47/52）, 86.5% （45/52） and 98.7% （51/52）, respectively. Conclusion CT with rectal inflation of gas can clearly show the sizes shape, depth of invasion, lymph node metastasis, the relationship with the surrounding organs and distant metastasis, imaging features of the mesorectum. CT with rectal inflation of gas have a higher consistency with TNM staging, and it is an important method for preoperative staging for rectal cancer.