Yale School of Medicine, New Haven, CT 06520, USA.
Acta Neurochir (Wien). 2012 Sep;154(9):1707-10. doi: 10.1007/s00701-012-1435-9. Epub 2012 Jul 26.
"True" posterior communicating artery (PCOM) aneurysms are rare variants in which the aneurysm arises solely from the PCOM rather than the junction of the internal carotid artery and the PCOM.
It is critical to note that for true PCOM aneurysms, the neck arises distal to the origin of the PCOM and therefore lies in what is traditionally an intra-operative blind spot. The PCOM must be followed posteriorly to visualise the aneurysm neck for microsurgical clipping.
A thorough pre-operative understanding of this unique anatomy is essential in minimising morbidity associated with microsurgical clipping of this aneurysm configuration.
“真性”后交通动脉（PCOM）动脉瘤是一种罕见的变异，其动脉瘤仅起源于 PCOM，而不是颈内动脉和 PCOM 的交界处。
需要注意的是，对于真性 PCOM 动脉瘤，瘤颈起源于 PCOM 的远端，因此位于传统手术中的盲区。必须沿 PCOM 向后追踪以观察到动脉瘤颈，以便进行显微夹闭手术。
在最小化与这种动脉瘤形态相关的显微夹闭手术并发症方面，术前全面了解这种独特的解剖结构至关重要。
