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目的探讨视网膜母细胞瘤(RB)的多层螺旋CT(MSCT)及MRI表现特点。方法回顾性分析经手术病理证实29例RB的CT及MRI表现。所有患者术前均行MSCT平扫+增强扫描,20例行MRI平扫,11例平扫+增强。结果 CT扫描29例病变均表现为眼球后壁不均匀软组织密度肿块突入玻璃体腔,均见有钙化,9例眼球大小正常,17例眼球增大,3例眼球变小。MRI扫描均表现为眼球内软组织信号。结论 RB在MSCT表现上具有一定的特征性,MSCT对显示钙化有明显优势,MRI对肿瘤的内部形态、肿瘤的蔓延及其增强显示良好,MSCT和MRI可显示RB的形态、大小及内部特征,有助于诊断及鉴别诊断。
Objective To investigate the multi-slice spiral CT (MSCT) and MRI features of retinoblastoma (RB). Methods The CT and MRI findings of 29 cases of RB confirmed by surgery and pathology were retrospectively analyzed. All patients underwent MSCT scan and enhanced scan before operation, 20 patients underwent plain scan and 11 patients underwent plain scan and enhanced scan. Results CT scan of 29 cases showed uneven posterior parietal soft tissue density into the vitreous cavity, were found calcification, 9 cases of normal eye size, 17 eyes increased, 3 cases of the eye smaller. MRI scans show intraocular soft tissue signals. Conclusion RB has some characteristic features in MSCT. MSCT has obvious advantages in displaying calcifications. MRI shows the internal morphology of tumor, the spread of tumor and its enhancement. MS, MRI can show the morphology, size and internal features of RB, Help diagnosis and differential diagnosis.