Dembo Tomohisa, Tanahashi Norio
Department of Neurology, EIJU General Hospital, Japan.
Intern Med. 2012;51(10):1249-53. doi: 10.2169/internalmedicine.51.7066. Epub 2012 May 15.
A 24-year-old woman presented with headache and left-sided focal signs following multiple episodes of right monocular visual impairment. Magnetic resonance angiography revealed a decreased vascular image intensity due to a suspicious stenosis in the right internal carotid artery (ICA). The stenosis was not demonstrated on duplex sonography as it was beyond the field of view of the investigation. Intravascular ultrasound (IVUS) revealed that the outer vessel diameter was significantly reduced during stenosis, supporting the presence of vasospasm. Idiopathic recurrent extracranial ICA vasospasm was diagnosed. Recurrent vasospasms of extracranial ICA may be a distinct entity that can cause ischemic stroke.
一名24岁女性在多次出现右侧单眼视力障碍后，出现头痛和左侧局灶性体征。磁共振血管造影显示，右侧颈内动脉（ICA）存在可疑狭窄，血管图像强度降低。由于该狭窄超出了超声检查的视野范围，在双功超声检查中未显示。血管内超声（IVUS）显示，狭窄时血管外径明显减小，支持血管痉挛的存在。诊断为特发性复发性颅外ICA血管痉挛。颅外ICA复发性血管痉挛可能是一种可导致缺血性卒中的独特病症。
