小儿纵隔肿瘤的超声检查

探讨小儿纵隔肿瘤超声影像学特点及超声的诊断价值。方法采用超声仪探查２３例患儿病变区的位置，大小形态和内部回声情况，并将结果与手术及病理发现相比。结果：本组超声诊断符合率９５％。发生在后纵隔的以神经源性肿瘤最常见，发生在前纵隔和中纵隔最多见的肿瘤是畸胎瘤及淋巴瘤。良性肿瘤边界清楚，内部回声较均质。恶性肿瘤边界模糊，仙部以低回声或混合回声为主，常伴有胸腔积液或心包腔积液。结论：超声有利于直接观察纵隔肿

Ultrasonography in the Diagnosis of Mediastinal Tumors in Children

Objectives To analyse the sonographic characteristics of mediastinal tumors in pediatric patiens and to evaluate the application value of ultrasonography. Methods 23 cases were examined by ultrasound to assess the location, extension and internal echo structure of the lesion.The results of ultrasonography were compared with those of surgery findings. Results Overall diagnostic ac- curacy of ultrasonography was 95 %. In our cases, during childhood the common posterior mediastinal tumor is neurogenic in origin, and the common anterior middle mediastinal tumor in either teratomas/dermoids or lymphanioma. The specific sonogram was well - defind margin and homogeneous internal echo in benign lesions, but ill - defined margin and mixed or low density echo in malingnant tu- mors. the pleural or pericardium effusions were found in some malignant lesions. Conclusion ultransonography had special value in diag- nosis the nature and localization of the mediastional tumors. Sonograhy guided needle biopsy will play an important role in pathological diagnasis.