Xiao Anqi, Xu Jianguo, He Xin, You Chao
Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, People’s Republic of China.
J Neurosurg Pediatr. 2013 Sep;12(3):247-50. doi: 10.3171/2013.6.PEDS137. Epub 2013 Jul 26.
Choroid plexus papilloma (CPP) is extremely rare in the brainstem. The authors report the case of a 10-year-old boy with a lesion in the pons that was misdiagnosed as a glioma preoperatively. The boy underwent partial resection of the lesion, which was diagnosed as a CPP based on histopathological findings. The authors review the MRI findings in this case and conclude that the presence of a well-defined boundary and no obvious cerebral edema are valuable features for distinguishing brainstem CPP from glioma. Although previous reports of parenchymal CPPs have described enhancement on contrast-enhanced T1-weighted MR images, the lesion in this case did not demonstrate significant enhancement. The authors note that the diagnosis of extraventricular CPP cannot be ruled out in a case of brainstem tumor without marked enhancement.
脉络丛乳头状瘤（CPP）在脑干极为罕见。作者报告了一例10岁男孩，其脑桥有一病变，术前被误诊为胶质瘤。该男孩接受了病变部分切除术，根据组织病理学结果诊断为CPP。作者回顾了该病例的MRI表现，并得出结论，边界清晰且无明显脑水肿是将脑干CPP与胶质瘤区分开来的重要特征。尽管先前关于实质CPP的报道描述了对比增强T1加权MR图像上的强化，但该病例中的病变并未显示出明显强化。作者指出，对于无明显强化的脑干肿瘤病例，不能排除脑室外CPP的诊断。
