脉络丛肿瘤是中枢神经系统的上皮源性肿瘤,但免疫组化表型上可同时表达CK和Vi-mentin,部分还可表达GFAP,表明其并非一般所称的上皮。不典型脉络丛肿瘤在形态上及生物学行为上均有别于恶性的脉络丛癌。本文还介绍了电镜,DNA流式细胞术等新技术在脉络丛肿瘤研究中的应用结果。 Choroid plexus tumors are epithelial tumors of the central nervous system, but immunohistochemically, CK and Vi-mentin may be expressed simultaneously, and some may express GFAP, indicating that they are not commonly referred to as epithelia. Atypical choroid plexus tumor morphology and biological behavior are different from the malignant choroid plexus. This article also introduces the application of electron microscopy, DNA flow cytometry and other new techniques in the study of choroid plexus tumors.