基底动脉延长扩张症较少见 ,其 CT表现文献报道亦较少 ,现将我院遇到的 2例报告如下。例 1　女性 ,64岁 ,因头晕、呕吐伴流涎 1 d就诊。既往高血压病史 1 0余年。体检除右侧周围性面瘫外 ,余无阳性所见。头部 CT增强加薄层扫描 ,于脑桥前池内见一均匀强化的血管影 ,为异常扩张 Basilar artery dilation is rare, its CT performance of the literature is also less reported in our hospital now encountered two cases are reported as follows. Example 1 Female, 64 years old, dizziness, vomiting and drooling 1 d treatment. Previous history of hypertension more than 10 years. Physical examination in addition to the right peripheral facial paralysis, Yu no positive seen. CT enhancement of the head plus thin layer scan, seen in the anterior pith in a homogeneous enhancement of the vessel shadow, the abnormal expansion