CT结肠造影对结直肠癌的诊断价值

目的:探讨CT结肠造影(CTC)技术在结直肠癌术前诊断与分期中的应用价值。方法:对临床怀疑结直肠癌的33例患者进行CTC检查,将影像学结果与病理结果进行比较,分析CTC的敏感性与特异性。结果:22例患者CTC诊断为结直肠癌,其中20例被病理证实,CTC对结直肠癌诊断的敏感性为100%(20/20),特异性为84.6%(11/13)。CTC对结直肠癌分型诊断符合率为90%(18/20),其中对肿块型诊断的敏感性为100%,特异性为100%;对浸润型诊断的敏感性为77.8%,特异性为100%;对溃疡型诊断的敏感性为100%,特异性为85.7%。CTC对结直肠癌分期诊断符合率为75%,对Duke'sA期病变诊断的敏感性为100%,特异性为94.1%;对B期病变诊断的敏感性为80%,特异性为73.3%;对C期病变诊断的敏感性为60%,特异性为100%;对D期病变诊断的敏感性为71.4%,特异性为100%。结论:CTC检查能够提供多方面的诊断信息,对结直肠癌的诊断及术前分期都很有价值。

Diagnostic Value of CT Colonography in Colorectal Carcinoma

Objective: To investigate the applicable value in diagnosis and preoperative staging of the colorectal carcinoma by CT Colonography (CTC). Methods: CTC was performed for 33 patients who were suspected of colorectal carcinoma. The results of CTC were compared with those of pathological examination. Results: Among 22 patients who were diagnosed as the colorectal carcinoma by CTC, 20 were pathologically confirmed. The diagnostic sensitivity and specificity was 100% (20/20) and 84.6% (11/13) respectively. The accuracy of diagnosis for typing the carcinoma pathologic patterns was 90% (18/20). The sensitivity and specificity were 100% in the type of masses both, and were 77.8% and 100% in the type of infiltration and 100% and 85.7% in the type of ulceration. The accuracy of staging carcinoma with Duke was 75%. The sensitivity and specificity were 100% and 94.1% in Duke's A, 80% and 73.3% in Duke's B, 60% and 100% in Duke's C and were 71.4% and 100% in Duke's D, respectively. Conclusion: CTC examination could provide miscellaneous diagnostic information and can be of great value not only for accurate diagnosis of the colorectal carcinoma but also for preoperative staging of the disease.