Piotin M, Miralbés S, Cattin F, Marchal H, Amor-Sahli M, Moulin T, Bonneville J F
Department of Neuroradiology, Jean Minjoz University Hospital, Besançon, France.
Neuroradiology. 1996 Nov;38(8):730-3. doi: 10.1007/s002340050337.
We describe the MRA and MR angiography (MRA) features of persistent trigeminal artery (PTA) found incidentally in eight patients, with special attention to its origin, site and course. The different patterns of posterior communicating arteries were also noted. The PTA were shown on sagittal, coronal and axial MRI and on MRA. In four cases, the PTA arose from the lateral aspect of the intracavernous internal carotid artery, ran caudally, passing round the bottom of the dorsum sellae to join the basilar artery. In the other four cases, it arose from the medial aspect, ran caudally through the sella turcica and pierced the dorsum sellae to join the basilar artery. The posterior communicating arteries were present unilaterally in five cases and bilaterally in one, and absent bilaterally in two. Identification of a PTA with a trans-sellar course is crucial if a trans-sphenoidal surgery is planned.
我们描述了8例偶然发现的持续性三叉动脉（PTA）的磁共振血管造影（MRA）特征，特别关注其起源、位置和走行。同时也记录了后交通动脉的不同形态。PTA在矢状位、冠状位和轴位MRI及MRA上均有显示。4例中，PTA起源于海绵窦内颈内动脉外侧，向后走行，绕过鞍背底部与基底动脉相连。另外4例中，它起源于内侧，向后穿过蝶鞍并穿透鞍背与基底动脉相连。后交通动脉单侧存在5例，双侧存在1例，双侧缺如2例。如果计划进行经蝶窦手术，识别走行经蝶窦路径的PTA至关重要。
