颈内动脉比较恒定地由颈总动脉平甲状软骨上缘处分出。稀有情况下,颈内动脉可以一侧缺如,甚至两侧缺如,主要由大脑后动脉代偿脑的血供。现将作者在脑血管造影中遇到的左侧颈内动脉缺如病例报告如下。患者:男,44岁。该患者在1988年10月29日走路时,突然出现右侧肢体活动不灵,伴有头痛、头 The internal carotid artery is relatively constant out of the upper edge of the common carotid artery’s thyroid cartilage. Rare cases, the internal carotid artery can be missing on one side, or even missing on both sides, mainly by the cerebral artery compensatory brain blood supply. The authors now report the absence of left internal carotid arteries in cerebrovascular angiography as follows. Patient: Male, 44 years old. When the patient walked on October 29, 1988, a sudden onset of limb movement on the right hand side was not accompanied by a headache and a headache