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目的 探讨MRI在儿童小脑良性细胞瘤 (BCAs)诊断中的价值。方法 对 12名BCAs患儿临床及MRI资料进行回顾性分析。结果 12例肿瘤中 7例定位于小脑半球 ,4例位于蚓部 ,1例位于第四脑室内。所有患儿均有脑积水 ,其中重度 9例 ,中度 3例。最常见的临床表现为头痛和呕吐 ,肿瘤直径为 2 3～ 68mm ,平均 42mm。 12例中 7例为囊性瘤 ,5例为实体瘤。与正常脑实质比较 ,在T1WI上 ,10例BCAs表现为为低信号影 ,9例在T2 WI上表现为高信号影。静脉注射对比剂后 ,12例中有 2例明显增强 ,5例为中度增强 ,5例未增强。出血和钙化分别为 1例、0例。结论 BCAs在MRI上的表现具有相对特征性 ;MRI对于BCAs的诊断和手术治疗方案的制定具有重要意义。
Objective To investigate the value of MRI in the diagnosis of cerebellar cerebellar small cell tumors (BCAs). Methods The clinical and MRI data of 12 children with BCAs were retrospectively analyzed. Results Of the 12 tumors, 7 were located in the cerebellar hemisphere, 4 in the vermis, and 1 in the fourth ventricle. All children had hydrocephalus, including 9 cases of severe, moderate in 3 cases. The most common clinical manifestations of headache and vomiting, tumor diameter of 23 ~ 68mm, an average of 42mm. Of the 12 cases, 7 were cystic and 5 were solid tumors. Compared with normal brain parenchyma, 10 cases of BCAs showed low signal intensity on T1WI and 9 cases showed high signal intensity on T2WI. After intravenous injection of contrast agent, 2 of 12 cases were significantly enhanced, 5 cases were moderately enhanced and 5 cases were not enhanced. Bleeding and calcification were 1 case and 0 case, respectively. CONCLUSIONS: The performance of BCAs in MRI is relatively characteristic. MRI is of great significance for the diagnosis of BCAs and the development of surgical treatment plans.