目的　探讨脑脊液细胞学检查在诊断中枢神经系统白血病中的价值。方法　采用粟氏FMU - 5微型细胞玻片离心沉淀仪收集脑脊液中细胞 ,显微镜下观察。结果　 18例各型白血病患儿 12 6例次脑脊液细胞学检查 ,病例及标本阳性率分别为 38 8%和 15 9%。结论　脑脊液细胞学检查是诊断中枢神经系统白血病的可靠方法 ,尤其是在临床表现阴性的患儿更为重要。此法对小儿中枢神经系统白血病的早期诊断、预后判断、治疗监护均有十分重要的价值 Objective To investigate the value of cerebrospinal fluid cytological examination in the diagnosis of central nervous system leukemia. Methods The cells in cerebrospinal fluid (CSF) were collected by using the FMU - 5 microcentrifuge sedimentometer and observed under a microscope. Results The positive rate of cerebrospinal fluid (CSF) of 12 6 children with leukemia in 18 cases was 38 8% and 15 9% respectively. Conclusion CSF cytology is a reliable method for the diagnosis of central nervous system leukemia, especially in children with clinical manifestations. This method of early diagnosis of children with central nervous system leukemia, prognosis, treatment monitoring are very important value