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目的：报告儿童后腹膜肿块常见与不常见的占位性病变的ＣＴ与Ｂ超表现。材料和方法：对３８例儿童后腹膜肿块病变进行临床，ＣＴ与Ｂ超资料的回顾性分析。结果：本组儿童后腹膜肿块共有１１种病变，以肾上腺和后腹膜神经母细胞瘤最常见，畸胎瘤与肾胚胎瘤其次，肾上腺皮质癌与新生儿肾上腺出血较少见。１１种儿童后腹膜肿块的临床，ＣＴ与Ｂ超特点各不相同。结论：结合临床、ＣＴ与Ｂ超特点对大部分儿童后腹膜肿块能作出明确的诊断。
OBJECTIVE: To report CT and B-ultrasound findings of common and uncommon occupying lesions in retroperitoneal masses in children. Materials and Methods: Retrospective analysis of 38 cases of retroperitoneal mass lesions in children with clinical, CT and B ultrasound data. Results: The posterior peritoneal mass in this group of children had 11 kinds of lesions. The adrenal gland and retroperitoneal neuroblastoma were the most common ones. Teratoma and neoplastic embryogenesis were the second most common cause. Adrenocortical carcinoma and neonatal adrenal bleeding were less common. 11 kinds of children with retroperitoneal mass clinical, CT and B-super-different characteristics. Conclusion: Combined with the clinical, CT and B-ultrasound characteristics of most children with retroperitoneal mass can make a clear diagnosis.