title: A hyperdense artery sign and middle cerebral artery dissection.
abstract: We describe a rare case of spontaneous middle cerebral artery (MCA) dissection that caused cerebral infarction and subarachnoid hemorrhage (SAH), which also presented with a hyperdense artery sign. A hyperdense artery sign of the MCA in acute cerebral infarction strongly indicates thromboembolic MCA occlusion, which is often treated with thrombolytic therapy. However, thrombolytic therapy for intracranial artery dissections has both risks and benefits, due to the association of artery dissections with SAH. Therefore, it is important to keep in mind that an MCA dissection can also cause cerebral infarction with a hyperdense artery sign, particularly in young patients presenting with headache.
authors.affiliation: Division of Neurology, Department of Internal Medicine, Saga University Faculty of Medicine, Saga, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yakushiji
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Haraguchi
authors.forename: Shu
authors.initials: S
authors.lastname: Soejima
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Takase
authors.forename: Akira
authors.initials: A
authors.lastname: Uchino
authors.forename: Shunzo
authors.initials: S
authors.lastname: Koizumi
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Kuroda
mesh_terms: D000328:Adult; D000784:Aortic Dissection / Q000150:complications* / Q000175:diagnosis; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D020244:Infarction, Middle Cerebral Artery / Q000209:etiology*; D002532:Intracranial Aneurysm / Q000150:complications* / Q000175:diagnosis; D018810:Magnetic Resonance Angiography; D008297:Male; D020768:Middle Cerebral Artery / Q000000981:diagnostic imaging / Q000473:pathology; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000209:etiology*; D014057:Tomography, X-Ray Computed