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.
Abbreviations used in this paper:CPA = cerebellopontine angle; CPP = choroid plexus papilloma.
Address correspondence to: Chao You, M.D., Department of Neurosurgery, West China Hospital, Sichuan University, 37 Guo Xue Xiang St., Chengdu, Sichuan 610041, People's Republic of China. email: email@example.com.
Please include this information when citing this paper: published online July 26, 2013; DOI: 10.3171/2013.6.PEDS137.
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