超声内镜下肺癌纵隔淋巴结的影像学特征

为探讨超声内镜 (EUS)下肺癌纵隔淋巴结的影像学特征 ,以便为EUS在肺癌术前分期中的应用奠定基础 ,对 2 1例肺癌患者手术切除的 10 3枚纵隔淋巴结的EUS声像图进行研究。结果显示 ,良、恶性淋巴结均为低回声 ;恶性淋巴结的影像学特征为短径≥ 1.0cm ,边界清楚或圆形 ;而良性淋巴结大多短径 1.0cm ,边界不清 ;其差异具有统计学意义 (P <0 .0 1)。淋巴结的长径及长、短径的比值良、恶性淋巴结无显著差异 (P >0 .0 5 )。提示超声内镜对肺癌纵隔淋巴结的良恶性鉴别有一定价值

ENDOSONOGRAPHIC FEATURES OF MEDIASTINAL LYMPH NODES IN LUNG CANCER PATIENTS

The purpose of this study was to evaluate the features of mediastinal lymph nodes in lung cancer patients during endoscopic ultrasonography(EUS), and to establish the clinical method for the preoperative staging of lung cancer using EUS. The EUS patterns of 103 lymph nodes in 21 patients with lung cancer were evaluated. Confirmation of benign and malignant lymph nodes was obtained by surgical resection and pathology. The following features were compared between benign and malignant lymph nodes: short axis , long axis, distinct margins and the shape of nodes. The results showed that all of the lymph nodes were hypoechoic. Both the short axis greater than 1.0cm and distinct margins or round shape independently predicted malignant invasion ( P <0.01). The long axis and the ratio of long/short axis were found to be not significant in the diagnosis of malignant lymph node. It is suggested that EUS is a helpful method for the diagnostic evaluation of mediastinal lymph nodes in patients with lung cancer.