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目的探讨CT仿真内镜(CT virtual endoscopy,CTVE)在低位直肠癌术前分期中的价值。方法收集我院2008年8月1日至2011年3月1日期间的直肠癌患者57例,术前行直肠CTVE检查,详细记录患者直肠癌周围组织浸润和淋巴结转移的情况;患者术后常规进行病理检查,比较两者结果的差异。结果术前直肠CTVE检查与术后石蜡病理检查对直肠癌周围淋巴结转移的判断经四格表χ2检验,差异无统计学意义(χ2=2.5,P>0.05),其对直肠癌周围淋巴结转移预测的敏感性为66.67%,特异性为93.94%。术前直肠CTVE预测直肠癌周围组织浸润和术后病理检查结果经四格表χ2检验,差异有统计学意义(χ2=4.4,P<0.05),其对直肠癌周围组织浸润判断的敏感性为27.78%,特异性为42.86%。结论 CTVE在术前评估直肠癌周围淋巴结转移有较高的可信性,但对直肠癌周围组织浸润的评价较差。
Objective To investigate the value of CT virtual endoscopy (CTVE) in the preoperative staging of low rectal cancer. Methods 57 patients with rectal cancer in our hospital from August 1, 2008 to March 1, 2011 were enrolled in this study. The patients underwent rectal CTVE before operation to record the infiltration and lymph node metastasis of the patients with rectal cancer. The patients’ Pathological examination, the difference between the two results. Results The preoperative rectal CTVE and postoperative paraffin pathological examination of the rectal cancer around the lymph node metastasis by the four grid table χ2 test, the difference was not statistically significant (χ2 = 2.5, P> 0.05), the prognosis of rectal cancer lymph node metastasis The sensitivity and specificity were 66.67% and 93.94% respectively. The preoperative CT scan of rectal tissue around the tissue invasion and postoperative pathological examination results by χ2 test four tables, the difference was statistically significant (χ2 = 4.4, P <0.05), and its sensitivity to determine the surrounding tissue rectal cancer infiltration 27.78% and specificity of 42.86%. Conclusion CTVE has high reliability in assessing the lymph node metastasis around the rectal cancer before operation, but it is poorly evaluated in the tissue around the rectal cancer.