開通せる上矢状静脈洞の後半部切除を行つた2症例

RESECTION OF PATENT SUPERIOR LONGITUDINAL SINUS POSTERIOR TO ROLANDIC VENOUS INFLOW. REPORT OF 2 CASES

　脳手術に際して上矢状静脈洞を結紮乃至切除する事が手術操作を簡単化するのに役立つ場合，或は手術遂行上必要な場合がある。この上矢状洞の血流遮断の可否はその部位がローランド氏静脈より前方であるか，後方であるか，更に手術前既に同静脈洞に種々の程度の循環障害を来しているか，完全に開通したまま存しているか等によつて異り，一様には論ぜられぬ様である。我々は最近，脳膜腫瘍を上矢状洞を含めて切除し，手術後何等不快な神経症状を呈しなかつた症例を経験したのでここに報告する。

Following the resection of the patent su-perior longitudinal sinus, especially of its po-sterior portion, it has been said that an ex-tensive circulatory disturbance of bilateral ce-rebral hemispheres develops and subsequently severe neurological symptoms are to appear. Pertaining to this problem, 2 such cases are presented and discussed.

Report of cases:

Case 1. A. T., a man aged 55, was admitted to our hospital because of a large painless tumor in the occipital region. This tumor, dural metastasis of hepatoma, was enucleated together with posterior portion of the longitu-dinal sinus. The length of the sinus removed was 7cm.

Case 2. Y. H., a woman aged 48, was ad-mitted because of progressing left hemipare-sis. A right parietal parasagittal meningio-ma was found and removed together with posterior portion of the longitudinal sinus. The length of the resected sinus was 3cm.

In both cases, the resection of the dural sinus was performed in its portion between the branching of rolandic vein and torcular Herophili. On examining the resected long-itudinal sinuses, their patency was found to be reserved and any thrombosis, inflammatory process or tumor invasion was not found.