大多数脑膜炎双球菌脑膜炎发生在5岁以下儿童。但近期来年长儿和年轻成人的发病率有增加趋势。本文报导1例成人脑膜炎双球菌脑膜炎病例,因急性脑室扩张而病情恶化。患者男,24岁。因头痛、恶心呕吐8小时首次就诊,诊为病毒感染性疾病,给予输液及止吐药治疗。8小时后,因出现意识障碍发作急诊入院。入院 Most meningococcal meningitis occurs in children under 5 years of age. However, the incidence of older children and young adults has been on the rise recently. This article reports 1 case of meningococcal meningitis in adults, exacerbated by acute ventricular dilatation. Patient male, 24 years old. Due to headache, nausea and vomiting for the first time for 8 hours, diagnosed as viral infectious diseases, given infusion and antiemetic drugs. Eight hours later, episodes of unconsciousness were admitted to hospital for emergencies. Admission