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目的：研究小儿腹膜后神经源性肿瘤的ＭＲＩ表现特点及其诊断价值。材料与方法：对１４例小儿腹膜后神经源性肿瘤行ＭＲＩ检查，包括Ｇｄ－ＭＴＰＡ增强扫描（１０例），磁共振血管造影（ＭＲＡ）和磁共振泌尿道造影（ＭＲＵ）（６例）。１０例手术切除，４例手术探查后取活检。将ＭＲ表现与手术结果对照评价ＭＲ的诊断价值。结果：多数肿瘤（１２／１４）位于脊柱两侧和肾上腺区，良性者多数（５／７）Ｔ１ＷＩ信号均匀，伴有明显出血坏死和侵犯椎体、椎管则强烈提示为恶性。ＭＲＡ和ＭＲＵ能很好地显示肿瘤与重要血管和输尿管的关系，为外科术前提供重要信息。增强扫描肿瘤实体均有中等以上明显强化。结论：ＭＲＩ能比较准确地反映小儿腹膜后神经源性肿瘤的组织学特性，很好地显示肿瘤与邻近器官和重要结构的关系，是目前诊断此病的最好方法
Objective: To study the MRI features and diagnostic value of children with retroperitoneal neurogenic tumors. MATERIAL AND METHODS: MRI was performed on 14 cases of children with retroperitoneal neurogenic tumors, including Gd-MTPA enhanced scan (10 cases), magnetic resonance angiography (MRA) and magnetic resonance urography (MRU) (6 cases). Surgical resection was performed in 10 cases and biopsy was performed in 4 cases after surgical exploration. The diagnostic value of MR was evaluated by comparing the MR findings with the surgical findings. Results: The majority of tumors (12/14) were located on both sides of the spine and the adrenal gland. The majority of benign (5/7) T1WI signals were homogeneous with significant hemorrhage and necrosis and vertebral invasion. The spinal cord strongly suggested malignancy. MRA and MRU can well show the relationship between tumor and important vessels and ureters, which provide important information for surgery before surgery. Enhanced scan of tumor entities were significantly enhanced above the average. Conclusion: MRI can accurately reflect the histological characteristics of children with retroperitoneal neurogenic tumors, which shows the relationship between tumor and adjacent organs and important structures well. It is the best method to diagnose this disease