小脑血管母细胞瘤11例免疫组化及超微结构的研究

目的探讨小脑血管母细胞瘤的临床病理特征及间质细胞的起源，以提供病理诊断和鉴别诊断依据。方法对11例小脑血管母细胞瘤进行组织形态观察及NSE、lysozyme、AAT、AACT、GFAP、S-100、desmin、EMA、CD34、CK免疫组化标记，对其中1例做了电镜观察。结果11例中发生于左小脑半球3例，右小脑半球6例，小脑蚓部2例；表现为高颅压者9例，共济失调者6例；两者同时存在者6例。肿瘤间质细胞NSE、lysozyme、AAT、AACT、GFAP、S-100、desmin全部或部分( )；而EMA、CD34、CK(-)。电镜未见特异性改变。结论血管母细胞瘤是一种好发于成人小脑部位的良性肿瘤，肿瘤的间质细胞有神经内分泌分化能力，可能为神经内分泌来源的肿瘤。

Hemangioblastoma in cerebellum:an immunohistochemical and ultrastructural study of 11 cases

ObjectiveTo study the clinicopathological feature s and histogenesis of the stromal cells of hemangioblastoma in cerebellum MethodsThe paraffin-embbeded sections of 11 cases were stained immunohistochemically for NSE, lysozyme, AAT,AACT, GFAP, S- 100, desmin, EMA, CD34, and CK, and one of them was observed by transmission-elec tron microscopy ResultsThe patients ranged from 23 to 60 years old (average 41 7) Three of 11 cases were located in left lobe of the cerebella, a nd six in right lobe, and two in the cerebellar vermis The symptoms of intracranial h ypertension occurred in 9 cases (82%), dystonic movement in 6 cases (56%), and both in 6 cases The stromal cells were positive for NSE, lysozyme, AAT, AACT, GFAP, S-100, and desmin, and negative for EMA, CD34 and CK There was no evident special change in the ultrastructural observition ConclusionsHemagioblastoma is a benign tumor which occurs commonly in adult. The st romal cells is positive for neuroendocrine markers, which suggests that the tumor may be originated from neuroendocrine system