摘要
目的：探讨MRI诊断成人髓母细胞瘤的价值。材料和方法：回顾性分析25例经病理证实的成人髓母细胞瘤的MRI表现。结果：25例中，位于小脑半球11例、第四脑室9例、小脑上蚓2例和第四脑室顶部3例。肿瘤直径3～7cm。18例形态不规则，7例呈类圆形，所有肿瘤均有不同程度的囊变、坏死。增强扫描肿瘤实质部分明显增强8例，中度增强5例，轻度增强8例，未见增强4例。轻度脑积水10例，中度脑积水8例，重度脑积水7例。结论：成人髓母细胞瘤的MRI表现具有一定特点，结合发病部位仔细分析影像征象，大部分病例可诊断。
Purpose： To explore the value of MRI on the diagnosis of medulloblastoma in adults. Materials and Methods： MRI findings of 25 patients with pathologicall proved medulloblastoma were analyzed retrospectively. Results： Among the 25 cases of medulloblastomas, 11 located in cerebellar hemispheres, 9 in the fourth ventricle, 2 in eerebellar vermis and 3 in top of the fourth ventricle. The lesions were irregular in 18 cases and oval in 7 cases, with diameter from 3 to 7 cm. The cystic components or necrosis were seen in all 25 cases. The solid part of lesions were enhanced at different extent, with 8 marked enhancement,5 moderate enhancement, 8 slight enhancement. Among the 25 cases, slight hydrocephalus was found in 10 patients, moderate hydrocephalus in 8 patients, and severe hydrocephalus in 7 patients. Condusion： Medulloblastoma in adult has some eharicteristic MR features. Most cases can be diagnosed correctly by analyzing MR images combined with lesions position.
出处
《中国医学影像学杂志》
CSCD
2008年第5期356-360,共5页
Chinese Journal of Medical Imaging
