儿童后颅窝肿瘤的MRI影像学特征

MRI imaging features of Posterior Fossa Tumors in Children

目的:探讨儿童后颅窝肿瘤的MRI影像学特征,提高对儿童后颅窝肿瘤的影像诊断和鉴别诊断水平。方法:对本院25例经病理证实的儿童后颅窝肿瘤的临床特征和MRI表现进行回顾性分析。结果:25例儿童后颅窝肿瘤中星形细胞瘤8例、髓母细胞瘤12例、室管膜瘤3例、海绵状血管瘤2例。肿瘤位于小脑半球11例,小脑蚓部6例,第四脑室5例,脑干1例,桥小脑角2例。MRI能很好地显示肿瘤的发病部位、形态、大小、信号及强化特点,对梗阻性脑积水等间接征象也能较好展示。结论:MRI多参数、多平面成像对儿童后颅窝肿瘤的定位和定性诊断具有重要的临床价值。

Objective To explore the MRI features of posterior fossa tumors in children, and to improve the diagnosis and differential diagnosis of posterior fossa tumors in children. Methods Retrospective analysis of clinical features and MRI findings of 25 cases of posterior fossa tumors confirmed by pathology in our hospital. Results 8 cases of astrocytoma, 12 cases of medulloblastoma, 3 cases of ependymoma, 2 cases of cavernous hemangioma were included. The tumor were located in 11 cases of cerebellar hemisphere, 6 cases of cerebellar vermis, 5 cases of fourth ventricle, 1 case of brain stem and 2 cases of cerebellopontine angle. MRI showed the location, shape, size, signal and enhancement characteristics of the tumor, and obstructive indirect signs such as hydrocephalus can also be displayed better. Conclusion MRI multi-parameter and multi-planar imaging has important clinical value for the location and qualitative diagnosis of posterior fossa tumors in children.