原发性中脑出血是一种罕见的急性脑血管病。国内外文献报道极少。本文报告5例中脑出血，年龄在4O～46岁，既往有高血压病史，或起病时发现血压增高。多于活动状态下起病。笔者认为，此类患者多预后不良，本组3例均死〔。其中1例因血肿压迫中脑导水管导致颅内压急骤升高，出现枕 Primary middle cerebral hemorrhage is a rare acute cerebrovascular disease. Domestic and foreign literature rarely reported. This article reports 5 cases of mesencephalic hemorrhage, aged 4O ~ 46 years old, with previous history of hypertension, or onset of hypertension was found. More than active under the disease. I believe that many patients with poor prognosis in this group of three died [. One case of intracranial pressure due to hematoma oppression in the brain led to a sudden increase in pressure, there pillow