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本文报道8例经手术、病理证实的小儿后颅窝室管膜瘤。6例肿瘤位于第四脑室中线部位,其中5例中线肿瘤经外侧隐窝向桥脑小脑池扩展,占62.5%。1例肿瘤位于右桥脑小脑池及右外侧隐窝。1例为脑室外室管膜瘤,肿瘤位于小脑延髓池内。在平扫中肿瘤实质性部分呈高密度者2例,占25%;等密度和等高昆合密度各3例,各占37.5%;在平扫时肿瘤边界均不分明;钙化往往广泛显著,发生率为62.55。以上特点有利于对儿童后颅窝室管膜瘤的定性诊断。
This article reports 8 cases of pediatric posterior fossa ependymoma confirmed by surgery and pathology. 6 cases of tumor located in the midline of the fourth ventricle, including 5 cases of midline tumors through the lateral recess to the pons cerebellar pool expansion, accounting for 62.5%. One tumor was located in the right pons cerebellum and the right lateral recess. 1 case of extracerebral ependymoma, the tumor located in the cisterna magna. In the plain scan, the tumor was in high density in 2 cases (25%). The density of the isodense and the contour in 3 cases (37.5%) were the density of the tumor. The tumor boundary was not clear at the time of the plain scan. The calcification was usually significant , The incidence was 62.55. The above characteristics are conducive to the qualitative diagnosis of posterior fossa of the ependymoma.