为了对小儿腹膜后肿物进行早期诊断及鉴别诊断，同时给临床提供较正确的辅助诊断，我们采用X线、B超、CT及MRI等检查方法，收集了6o例小儿腹膜后肿物的病例进行分析，结果发现小儿腹膜后肿物种类较多且以肾母细胞瘤多发，本组占59％。对于小儿腹膜后肿物的检查我们认为用X线、B超、CT或MRI等影像学检查可以获得明确的诊断，对临床选择治疗方案有重要意义。 In order to early diagnosis and differential diagnosis of children with retroperitoneal tumor, and to provide more accurate clinical diagnosis, we use X-ray, B ultrasound, CT and MRI examination methods, collected 6o cases of children with retroperitoneal tumor cases Analysis, the results found that more children with retroperitoneal tumor types and multiple nephroblastoma, the group accounted for 59%. For children with retroperitoneal pelvic examination we believe that with X-ray, B ultrasound, CT or MRI imaging examination can get a clear diagnosis of clinical choice of treatment programs of great significance.