Tsutsumi Satoshi, Ono Hideo, Yasumoto Yukimasa, Ishii Hisato
Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, 279-0021, Urayasu, Chiba, Japan.
Division of Radiological Technology, Medical Satellite Yaesu Clinic, Tokyo, Japan.
Surg Radiol Anat. 2019 Feb;41(2):203-207. doi: 10.1007/s00276-018-2146-6. Epub 2018 Nov 29.
Few studies have characterized the venous channels of the falx cerebri under physiological conditions. The present study aimed to explore the falx cerebri using magnetic resonance imaging (MRI).
A total of 91 patients (41 men and 50 women) with an intact falx cerebri and relevant dural sinuses underwent contrast MRI.
In 15% of the participants, the falx cerebri contained venous channels with a patchy appearance. Seven of these channels were located in the anterior third of the falx, two were in the anterior two-thirds, and 5 were in the middle third. In 19 (21%) participants, the falcine sinus was unequivocally delineated. In 14 of them, connected the posterior third of the superior sagittal sinus and uppermost part of the straight sinus. These sinuses showed variable morphologies, presenting with linear, triangular, multi-channel, and branching appearances. The linear type was the most predominant and found in 50% of these cases. In contrast, in the remaining five participants, the falcine sinuses were coursing posteriorly, connecting the posterior third of the falx cerebri with the superior sagittal sinus.
The falx cerebri may have a role as a pathway in the intracranial venous circulation. The falcine sinus has several variants with diverse morphologies.
很少有研究对生理条件下大脑镰的静脉通道进行特征描述。本研究旨在利用磁共振成像（MRI）探索大脑镰。
共有91例大脑镰及相关硬脑膜窦完整的患者接受了对比增强MRI检查。
在15%的参与者中，大脑镰含有呈斑片状的静脉通道。其中7条通道位于大脑镰前三分之一处，2条位于前三分之二处，5条位于中三分之一处。在19名（21%）参与者中，大脑镰窦清晰可辨。其中14名参与者的大脑镰窦连接上矢状窦后三分之一和直窦最上部。这些窦呈现出多种形态，包括线性、三角形、多通道和分支状。线性类型最为常见，在这些病例中占50%。相比之下，在其余5名参与者中，大脑镰窦向后走行，连接大脑镰后三分之一和上矢状窦。
大脑镰可能在颅内静脉循环中起到通路的作用。大脑镰窦有多种形态变异。
