Conforto Adriana Bastos, de Souza Murilo, Puglia Paulo, Yamamoto Fábio Iuji, da Costa Leite Claudia, Scaff Milberto
Neurology Division, Hospital das Clínicas/São Paulo University, Brazil.
Clin Neurol Neurosurg. 2007 May;109(4):364-7. doi: 10.1016/j.clineuro.2006.12.005. Epub 2007 Jan 16.
The persistent hypoglossal artery (PHA) is the second most common persistent embryological carotid-basilar connection and usually represents an incidental finding in cerebral arteriograms. The hypoglossal artery connects the primordial carotid artery with the longitudinal neural arteries, which later form the basilar artery. The PHA leaves the internal carotid artery as an extracranial branch, enters the skull through the anterior condyloid foramen, the hypoglossal canal and joins the caudal portion of the basilar artery. We report magnetic resonance and digital subtraction angiography findings in the first case of bilateral occipital infarctions associated with PHA and carotid atherosclerosis. The probable mechanism underlying bilateral occipital infarcts was embolism from the carotid territory to the posterior cerebral arteries. PHA may present a challenge in diagnosis and management of patients with carotid atherosclerosis and vertebrobasilar ischemia.
永存舌下动脉（PHA）是胚胎期第二常见的持续存在的颈动脉-基底动脉连接，通常是在脑血管造影中偶然发现。舌下动脉将原始颈动脉与纵向神经动脉相连，后者随后形成基底动脉。PHA作为颅外分支离开颈内动脉，通过前髁孔、舌下神经管进入颅骨，并与基底动脉的尾部相连。我们报告了首例与PHA和颈动脉粥样硬化相关的双侧枕叶梗死的磁共振成像和数字减影血管造影结果。双侧枕叶梗死的可能机制是从颈动脉区域至大脑后动脉的栓塞。PHA可能给颈动脉粥样硬化和椎基底动脉缺血患者的诊断和治疗带来挑战。
