目的　探讨精原细胞瘤的超声诊断与临床意义。方法　采用二维 B超及彩色多普勒超声仪 ,对肿大睾丸作矢状、冠状及横断面扫查 ,充分显示其内部组织结构、血流情况及其附睾、精索回声图像 ,并与健侧睾丸和附睾的回声特点对比分析。病变睾丸声像图摄片留底备随访复查。结果　本组 6例 ,均经超声初次诊断为精原细胞瘤。结论　超声诊断精原细胞瘤的大小形态 ,定位、定量和定性以及临床分期准确 ,具有独特优势和重要的临床意义 Objective To investigate the ultrasonic diagnosis and clinical significance of seminoma. Methods Sagittal, coronal and cross-sectional scans of the enlarged testes were performed using two-dimensional ultrasonography and color Doppler ultrasound. The internal structure, blood flow, and epididymal and spermatic cord echo images were fully displayed. Contralateral analysis of echogenic characteristics of the testis and epididymis of the contralateral testis. Lesions of testicular images were prepared for follow-up review. Results In this group, 6 cases were all diagnosed as seminoma by ultrasound. Conclusion Ultrasound diagnosis of seminoma cell size, morphology, location, quantitative and qualitative and clinical staging accuracy, has unique advantages and important clinical significance