Results The main cause of acute encephalocele were delayed intracranial hematomas, acute diffuse brain swelling, cerebral contusion and laceration in Sylvain tissue and ischemic anoxia.
Methods: Using prospective studies research three stages with 202 brain contusion and laceration patients.
方法：对202例脑挫裂伤病人进行三个阶段的前瞻性研究。
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Objective to explore the reservation of bone flap in the surgical treatment of early stage brain hernia secondary to cerebral local contusion and laceration in a single lobe of brain.