超声双重造影术前评估直肠癌环周切缘状态的应用价值

目的:探讨超声双重造影术前评估直肠癌环周切缘(circumferential resection margin,CRM)状态的临床应用价值。方法:选取经病理确诊的63例直肠癌患者作为研究对象，术前行直肠超声双重造影以及盆腔增强磁共振成像(MRI)，分别评估直肠癌CRM，并与术后病理结果比较。结果:超声双重造影评估直肠癌CRM的准确率为93.65%(59/63)、敏感度为87.50%(14/16)，特异度为97.87%(45/47)；MRI评估直肠癌CRM的准确率为85.71%(54/63)、敏感度为93.75%(15/16)，特异度为82.98%(39/47)；超声双重造影评估直肠癌CRM特异度优于MRI检查，差异有统计学意义(P＜0.05)。结论:超声双重造影术前能有效评估直肠癌CRM状态，其特异度优于MRI，可作为MRI存在禁忌时的良好替代方法，具有较高临床应用价值。

Application value of double contrast-enhanced ultrasonography in preoperative evaluation of circumferential resection margin of rectal cancer

Objective:To evaluate the clinical value of double contrast-enhanced ultrasonography(DCEUS)in preoperative evaluation of the circumferential resection margin（CRM）of rectal cancer.Methods:a total of 63 patients with rectal cancer confirmed by pathology were selected as the research objects.Rectal DCEUS and pelvic enhanced magnetic resonance imaging(MRI)were performed before operation,and the CRM of rectal cancer was evaluated respectively，compared with postoperative pathological results.Results:The accuracy rate,sensitivity and specificity of DCEUS in the evaluation of rectal cancer CRM were 93.65%(59/63),87.50%(14/16),and 97.87%(45/47).The accuracy rate,sensitivity and specificity of MRI were 85.71%(54/63),93.75%(15/16),and 82.98%(39/47),respectively.The specificity of DCEUS in the evaluation of rectal cancer CRM was better than that of MRI(P＜0.05).Conclusion:DCEUS can effectively evaluate the CRM status of rectal cancer before operation,and its specificity is better than that of MRI.It can be used as a good alternative method when MRI has contraindications,and has high clinical diagnostic value.