直肠癌术后复发的CT诊断

目的　探讨直肠癌术后复发的CT诊断价值。方法　对 47例直肠癌术后患者行低张口服造影剂结合灌肠 (保留肛门者 )进行CT平扫和增强扫描 ,对局部改变进行分类 ,分析局部复发的CT征象。结果　 47例中 ,肿瘤复发 2 6例 ,其中骶前球形软组织块 13例 ,直肠壁不规则增厚 8例 ,骶前扁平软组织块 2例 ,低密度包块 3例。复发灶强化程度高于良性病变。结论　骶前强化明显的球形、不规则、不对称性软组织影或直肠壁不规则增厚是常见的复发表现。低张灌肠结合增强CT扫描有助于直肠癌术后复发的诊断。

The Diagnosis of Recurrent Rectal Cancer Using Computed Tomography

Objective To assess the value of CT in diagnosis of recurrent rectal carcinoma.Methods Forty seven patients who had undergone locally curative surgery were examined by CT.All patients received intravenous contrast medium and two oral doses and a intrarectal doses of 500 ml 3% Ultravist were given.The characters of benign and malignant lesions were analysed in order to evaluate the value of the classification on CT in the differentiation of benign masses from malignant ones.Results 26 local recurrences occurred in 47 cases,including 13 cases with an round preasacral mass,8 cases with an irregular rectal wall thickening,2 cases with a flat preasacral mass,3 cases with a preasacral mass with low attenuation.The degree of enhancement of local recurrent masses was higher than that of benign masses.Conclusion The features of recurrence of rectal carcinoma on CT is an round or irregular asymmetrical preasacral mass or an irregular rectal wall thickening.It is useful way in diagnosis of recurrence of rectal carcinoma.