摘要
目的 探讨CT、MRI对小儿腹膜后成神经细胞瘤的诊断价值和限度。方法 对 32例中2 0例术前同时行MRI、CT检查者与术中所见对照 ,并对其中 19例术后离体肿瘤的MRI、CT影像与病理大切片对照。结果 MRI表现一般为T1WI中低信号 ,T2 WI明显高信号 ,且可见低信号网格及肿瘤对血管的包绕。组织学基础 :原始成神经细胞核大密集 ,无间质 ;瘤巢周围有神经纤维。CT表现肿瘤为不均匀低密度 ,可见钙化。术前判断肿瘤存在 :MRI与CT等同 ;明确肿瘤存在部位 :MRI优于CT者3例 ;判断进展程度 :MRI优于CT者 3例 ;有无血管侵袭 (15例 ) :MRI优于CT者 9例。结论 MRI对小儿腹膜后成神经细胞瘤的定性诊断较CT有意义。
Objective To evaluate the value and limitation of computer tomography and magnetic resonance imaging in the diagnosis of retroperitoneal neuroblastoma in children Methods Thirty two cases of retroperitoneal neuroblastoma in which 20 cases under went both CT and MR imaging before resection were reported In 19 cases MRI and CT of the gross specimens were correlated with histopathologic examination and also with the images before resection Results The MRI features of the tumor were hypointense on T 1WI and very hyperintense on T 2WI with hypointense net like strands scattered inside the tumor mass Vessels were usually invaded and encased by the tumor when the tumor was large CT features showed in homogeneous mass with high nuclear plasmic ratio, without or very scanty stroma The tumor nest was surrounded by thick neural fibrils Comparison of MRI and CT in diagnosis: assessment of the presence of tumer mass, CT=MRI; assessment of location of tumor, MRI>CT in 3 cases;assessment of degree of progression , MRI>CT in 3 cases; assessment of invasion of vasculature(15 cases), in which MRI>CT in 9 Conclusion MRI plays a more important role in characterization of retroperitoneal neuroblastoma in children than CT
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2000年第2期114-117,共4页
Chinese Journal of Radiology
基金
1996年辽宁省科委自然科学基金资助项目!(962267)
关键词
成神经细胞瘤
腹膜后肿瘤
磁共振成像
CT
儿童
Children
Neuroblastoma
Tomography, X-ray computed
Magnetic resonance imaging
Pathology
Comparative study
