Endo Hideki, Honjo Kaori, Ono Hidetoshi, Ishikawa Kohei, Nakamura Hirohiko
Department of Neurosurgery, Nakamura Memorial Hospital, South 1, West 14, Chuo-ku, Sapporo, Hokkaido, 060-8570, Japan.
Department of Radiology, Nakamura Memorial Hospital, Sapporo, Hokkaido, Japan.
Neurol Sci. 2025 May;46(5):2339-2341. doi: 10.1007/s10072-024-07966-y. Epub 2024 Dec 27.
Spontaneous thrombosis of intracranial aneurysms is rare. Spontaneous regression of unruptured small saccular aneurysms is even more rare. A 76-year-old woman with a history of hypertension and dyslipidemia was referred for evaluation of an unruptured intracranial aneurysm. Magnetic resonance angiography showed a left internal carotid artery aneurysm with a maximum width of 4.0 mm and a neck diameter of 3.0 mm. She was monitored using annual magnetic resonance angiography. Imaging at the 8.5-year follow-up showed partial aneurysm regression and stenosis in the parent artery proximal to the aneurysm. The next year, it had almost completely regressed. Spontaneous regression can occur even with unruptured small intracranial aneurysms. In our patient, proximal parent artery stenosis may have played a role.
颅内动脉瘤的自发性血栓形成较为罕见。未破裂的小型囊状动脉瘤的自发性消退更为罕见。一名有高血压和血脂异常病史的76岁女性因未破裂的颅内动脉瘤前来评估。磁共振血管造影显示左侧颈内动脉瘤，最大宽度为4.0毫米，颈部直径为3.0毫米。对她进行了每年一次的磁共振血管造影监测。8.5年随访时的影像学检查显示动脉瘤部分消退，且动脉瘤近端的供血动脉出现狭窄。次年，动脉瘤几乎完全消退。即使是未破裂的小型颅内动脉瘤也可能发生自发性消退。在我们的患者中，供血动脉近端狭窄可能起到了一定作用。
