目的　探讨CT在中枢神经系统隐球菌感染 (以下简称隐脑 )诊治中的价值。方法　搜集 2 0例临床资料完整的隐脑CT扫描资料进行分析。结果　隐脑早期或轻型病例CT表现正常 ,中晚期主要表现为交通性脑积水70 % ,肉芽肿 2 5 % ,其它少见表现为脑内多发低密度灶、假性囊肿、弥漫性脑水肿、脑萎缩、颅内钙化灶。结论　CT检查有助于与常见的化脓性及结核性脑膜炎鉴别 ,后者脑膜增厚及强化均非常显著且更常引起梗阻性或交通性脑积水。 Objective To investigate the value of CT in diagnosis and treatment of cryptococcosis of the central nervous system (hereinafter referred to as cryptoplex). Methods Totally 20 cases of clinical data were collected for analysis of implicit brain CT scan. Results In early stage or mild stage of cryptotomy, CT was normal. In middle stage and advanced stage, the main manifestations were communicating hydrocephalus 70% and granuloma 25%. Other rare manifestations were intracranial low density lesion, pseudocyst, diffuse cerebral edema, Brain atrophy, intracranial calcification. Conclusions CT examination is useful in identifying common suppurative and tuberculous meningitis, which are significant and often cause obstructive or traffic hydrocephalus.