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目的：对腹部不能触及肿块的小儿神经母细胞瘤（隐蔽型）于手术前进行超声、ＣＴ与磁共振检查，以确定原发肿瘤的部位。材料与方法：本组共７１例，均来自中国医科大学第二临床学院小儿内、外科与眼科，５岁以下者５７例。均做过超声检查，２２例曾做ＣＴ检查，２５例曾做磁共振检查。结果：７１例中５２例超声于肾上腺或后腹壁显示实质性肿块，检出率７３％；ＣＴ检查２２例，１２例检出肿瘤，检出率５４５％；磁共振检查２５例，１９例检出肿瘤，检出率７６％。３９例行手术治疗，与手术对照，超声３８例符合，诊断符合率９７％；其中１２例曾做ＣＴ检查，仅６例符合，诊断符合率仅５０％；其中１６例曾做磁共振检查，全部与手术一致（１６／１６）。结论：影像学难以对本病作出定性诊断，而手术前影像学定位诊断，应以超声检查为主，必要时再对部分病例进行磁共振检查，即可取得较为满意的结果
OBJECTIVE: To perform sonography, CT, and magnetic resonance imaging on the pediatric neuroblastoma (cryptic type) in which the abdomen does not reach the mass before surgery to determine the location of the primary tumor. Materials and Methods: A total of 71 patients in this group came from the Department of Pediatric Internal Medicine, Surgery and Ophthalmology at the Second Clinical College of China Medical University. There were 57 patients under 5 years of age. Ultrasound examinations were performed. CT scans were performed in 22 cases and magnetic resonance imaging in 25 cases. RESULTS: Of the 71 cases, 52 cases showed solid mass on the adrenal gland or posterior abdominal wall with a detection rate of 73%; 22 cases were examined by CT, and 12 cases were detected with a detection rate of 54.5%; magnetic resonance examination was performed in 25 cases. 19 Tumors were detected in the cases with a detection rate of 76%. 39 patients underwent surgical treatment, compared with surgical control, ultrasound in 38 cases, diagnostic compliance rate of 97%; 12 cases had CT scan, only 6 cases were consistent, the diagnostic compliance rate was only 50%; 16 cases had done magnetic resonance examination, All are consistent with surgery (16/16). Conclusion: Imaging is difficult to make a qualitative diagnosis of this disease, and preoperative imaging location diagnosis should be based on ultrasound examination. If necessary, we can perform magnetic resonance examination on some cases to obtain more satisfactory results.