Delayed intraparenchymal hemorrhage (DIPH) is one of the complications of flow diverter (FD) treatment, however, the mechanism is unclear. We present the case of a 54-year-old woman with a partially thrombosed large internal carotid artery aneurysm. She presented intraparenchymal hemorrhage in the right parietal lobe three days after the successful FD treatment. We performed endoscopic hematoma removal, and then her consciousness disturbance was fully recovered. IMP single-photon emission computed tomography showed significant increase of cerebral blood flow in the right hemisphere. We diagnosed DIPH associated with hyperperfusion after FD treatment. It is necessary to consider that DIPH due to hyperperfusion may occur after FD treatment.

中文翻译：

---

分流器治疗后因灌注过多而引起的实质内出血延迟的情况。

延迟性实质内出血（DIPH）是分流器（FD）治疗的并发症之一，但其机制尚不清楚。我们介绍了一名54岁的女性患者的部分血栓形成的大型颈内动脉瘤的病例。成功进行FD治疗后三天，她的右顶叶出现实质内出血。我们进行了内镜下血肿清除术，然后完全恢复了她的意识障碍。IMP单光子发射计算机断层扫描显示右半球脑血流量显着增加。我们诊断出FD治疗后DIPH与过度灌注有关。有必要考虑到，FD治疗后可能会因过度灌注而发生DIPH。