title: Subdural hemorrhage caused by de novo aneurysm complicating extracranial-intracranial bypass surgery: case report.
abstract: A case of a de novo aneurysm leading to subdural hemorrhage after right extracranial-intracranial bypass surgery is described. After an uneventful 2-month postoperative course, the patient experienced sudden onset of occipital headache with vomiting. Radiological study disclosed an acute subdural hematoma in the right temporo-occipital region and a newly formed aneurysm at the site of patent superficial temporal artery-middle cerebral artery anastomosis. The anastomotic portion with the ruptured aneurysm was resected en bloc after alternative occipital artery-middle cerebral artery bypass, and the cut end of the superficial temporal artery was successfully used for end-to-side reanastomosis to the other middle cerebral artery branch. The histological examination of the ruptured aneurysm revealed the features of a true aneurysm.
authors.affiliation: Department of Neurological Surgery, Ehime University School of Medicine, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kohno
authors.forename: T
authors.initials: T
authors.lastname: Ueda
authors.forename: O
authors.initials: O
authors.lastname: Kadota
authors.forename: S
authors.initials: S
authors.lastname: Sakaki
mesh_terms: D000368:Aged; D000714:Anastomosis, Surgical; D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D016893:Carotid Stenosis / Q000601:surgery*; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000601:surgery*; D002548:Cerebral Revascularization; D005260:Female; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D006801:Humans; D002532:Intracranial Aneurysm / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D002546:Ischemic Attack, Transient / Q000601:surgery*; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D012086:Reoperation