頭蓋底の血管解剖

Skull Base Vessel Anatomy

Point

・頭蓋底の血管解剖には一定の法則がある．これを理解し，さまざまなバリエーションに対応する．

・塞栓術の際，注入条件などですべての吻合が観察できるわけではないこと，一部は病変を介した吻合も存在することを意識する．

　Knowledge of the arterial and venous anatomy of the skull base is essential to interventional neuroradiologists in assuring a safe procedure. The anatomy of this area is complex and difficult to master in a short period of time. However, knowing some basic rules and starting from basic structures facilitates learning. The author summarized in this article the important vascular structures at the skullbase from the extracranial to intracranial anastomosis and the dural arterial supply. The venous structures involving the cavernous sinus and the structures in the craniocervical junction area are also described. To make this knowledge practical, the final goal is for one to be able to accurately identify these vessels on angiographic images. Anastomoses can be formed when there is a common territory of supply. This fact is important when planning tumor embolization.