MR弥散加权成像诊断淋巴结转移:与病理相对照

Comparative study of diffusion-weighted imaging with pathologic diagnosis in metastatic lymph nodes

目的评价磁共振弥散加权成像(DWI)在转移性淋巴结诊断中的价值。方法对24例经手术证实的转移性淋巴结的MRI资料与病理结果进行对照分析。结果24例恶性肿瘤患者均成功完成DWI扫描,DWI诊断转移淋巴结163枚;术中共清扫淋巴结336枚,转移淋巴结137枚,DWI诊断淋巴结转移与手术病理诊断淋巴结转移差异无统计学意义(t=0.46,P=0.65)。DWI诊断淋巴结转移的敏感性、特异性、准确性、阳性和阴性预测值分别为91.97%、81.41%、85.71%、77.30%和93.64%。DWI对淋巴结转移的诊断价值优于常规序列;弥散成像灰阶反转图像显示淋巴结转移更加直观。结论磁共振DWI对淋巴结转移的诊断具有重要价值。

Objective To observe the value of diffusion-weighted imaging（DWI） in diagnosis of metastatic lymph nodes.Methods DWI data and pathologic results of 24 patients with metastatic lymph nodes pathologically proved were analyzed and compared.Results All the patients with malignant tumor underwent DWI examination successfully,and 163 metastatic lymph nodes were found.A total of 336 lymph nodes and 137 metastatic lymph nodes were diagnosed pathologically after surgical operation.There was no difference between DWI and pathological examination in the diagnosis of metastatic lymph nodes（t=0.46,P=0.65）.The DWI＇s sensitivity,specificity,accuracy,positive and negative predictive value was 91.97%,81.41%,85.71%,77.30% and 93.64%,respectively.DWI was prior to other sequences in the diagnosis of metastatic lymph nodes and reversal image of DWI displayed the metastatic lymph nodes more directly.Conclusion DWI has important value in the diagnosis of metastatic lymph nodes.